##### Table of Contents





UNITED STATES SECURITIES AND
EXCHANGE COMMISSION

Washington, D.C. 20549





Form 10-Q







|x | QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE
|- | -------------------------------------------------------

| | SECURITIES | EXCHANGE ACT OF 1934
| | ---------- | --------------------

For the quarterly period ended March 31, 2011

Commission File Number:001-33151





HANSEN
MEDICAL, INC.

(Exact name of registrant as specified in its charter)







|                         |  |                                     
|------------------------ |  | ------------------------------------
|Delaware                 |  | 14-1850535                          
|(State of Incorporation) |  | (I.R.S. Employer Identification No.)

800 East Middlefield Road, Mountain View, CA 94043

(Address of Principal
Executive Offices)

(650) 404-5800

(Registrants telephone number, including area code)





Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or
15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90
days.                                        
                                Yes  
þ    No   ̈

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to
Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such
files).                                        
            Yes   ̈    No   ̈

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer
or a smaller reporting company. See definition of large accelerated filer, accelerated filer and smaller reporting company in Rule 12b-2 of the Exchange Act.



|                           |  |                                               |  |                             
|-------------------------- |  | --------------------------------------------- |  | ----------------------------
|Large accelerated filer   ̈ |  |                                               |  | Accelerated filer  þ        
|                           |  |                                              
|Non-accelerated filer   ̈   |  | (Do not check if a smaller reporting company) |  | Smaller reporting company   ̈

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange
Act).                                        
                                         
                                         
                                         
                  Yes   ̈    No  
þ

The number of shares outstanding of the registrants
common stock as of April 29, 2011 was 54,547,487.









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##### Table of Contents

INDEX



|           |  |                                                                                                    |  |  |    | 
|---------- |  | -------------------------------------------------------------------------------------------------- |  |  | -- | 
|           |  | PART I - FINANCIAL INFORMATION                                                                     |  |  |   
|           |  |                                                                                                   
|Item 1.    |  | Condensed Consolidated Financial Statements (unaudited)                                            |  |  |    | 
|           |  |                                                                                                   
|           |  | Condensed Consolidated Balance Sheets as of March 31, 2011 and December 31, 2010                   |  |  | 1  | 
|           |  |                                                                                                   
|           |  | Condensed Consolidated Statements of Operations for the three months ended March 31, 2011 and
2010 |  |  | 2  | 
|           |  |                                                                                                   
|           |  | Condensed Consolidated Statements of Cash Flows for the three months ended March 31, 2011 and
2010 |  |  | 3  | 
|           |  |                                                                                                   
|           |  | Notes to Condensed Consolidated Financial Statements                                               |  |  | 4  | 
|           |  |                                                                                                   
|Item 2.    |  | Managements Discussion and Analysis of Financial Condition and Results of Operations              |  |  | 19 | 
|           |  |                                                                                                   
|Item 3.    |  | Quantitative and Qualitative Disclosures About Market Risk                                         |  |  | 32 | 
|           |  |                                                                                                   
|Item 4.    |  | Controls and Procedures                                                                            |  |  | 32 | 
|           |  |                                                                                                   
|           |  | PART II - OTHER INFORMATION                                                                        |  |  |    | 
|           |  |                                                                                                   
|Item 1.    |  | Legal Proceedings                                                                                  |  |  | 33 | 
|           |  |                                                                                                   
|Item 1A.   |  | Risk Factors                                                                                       |  |  | 35 | 
|           |  |                                                                                                   
|Item 2.    |  | Unregistered Sales of Equity Securities and Use of Proceeds                                        |  |  | 68 | 
|           |  |                                                                                                   
|Item 3.    |  | Defaults Upon Senior Securities                                                                    |  |  | 68 | 
|           |  |                                                                                                   
|Item 4.    |  | (Removed and Reserved)                                                                             |  |  | 68 | 
|           |  |                                                                                                   
|Item 5.    |  | Other Information                                                                                  |  |  | 68 | 
|           |  |                                                                                                   
|Item 6.    |  | Exhibits                                                                                           |  |  | 69 | 
|           |  |                                                                                                   
|Signatures |  |                                                                                                    |  |  | 71 | 



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##### Table of Contents

PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

HANSEN MEDICAL, INC.

Condensed Consolidated
Balance Sheets

(Unaudited)

(In thousands, except per share data)

|                                                                                                       |  |               |          |   |                  |   |          |  
|------------------------------------------------------------------------------------------------------ |  | ------------- | -------- | - | ---------------- | - | -------- | -
|                                                                                                       |  | March 31,2011 |          |   | December 31,2010 |  
|ASSETS                                                                                                 | 
|Current assets:                                                                                        |  |               |          |   |                  |   |          |  
|Cash and cash equivalents                                                                              |  | $             | 34,168   |   |                  | $ | 25,769   |  
|Short-term investments                                                                                 |  |               | 10,901   |   |                  |   | 2,264    |  
|Accounts receivable, net                                                                               |  |               | 4,546    |   |                  |   | 4,207    |  
|Inventories                                                                                            |  |               | 6,260    |   |                  |   | 6,232    |  
|Deferred cost of goods sold                                                                            |  |               | 2,544    |   |                  |   | 3,277    |  
|Current portion of note receivable                                                                     |  |               | 1,226    |   |                  |   | 1,201    |  
|Prepaids and other current assets                                                                      |  |               | 1,894    |   |                  |   | 1,796    |  
|                                                                                                       |  |               |          |   |                  |   |          |  
|Total current assets                                                                                   |  |               | 61,539   |   |                  |   | 44,746   |  
|                                                                                                       |  |              
|Property and equipment, net                                                                            |  |               | 9,290    |   |                  |   | 10,145   |  
|Note receivable, net of current portion                                                                |  |               | 2,301    |   |                  |   | 2,617    |  
|Restricted cash                                                                                        |  |               | 65       |   |                  |   | 65       |  
|Other assets                                                                                           |  |               | 435      |   |                  |   | 371      |  
|                                                                                                       |  |               |          |   |                  |   |          |  
|Total assets                                                                                           |  | $             | 73,630   |   |                  | $ | 57,944   |  
|                                                                                                       |  |               |          |   |                  |   |          |  
|                                                                                                      
|LIABILITIES AND STOCKHOLDERS EQUITY                                                                   | 
|Current liabilities:                                                                                   |  |               |          |   |                  |   |          |  
|Accounts payable                                                                                       |  | $             | 1,782    |   |                  | $ | 3,157    |  
|Accrued liabilities                                                                                    |  |               | 9,343    |   |                  |   | 4,852    |  
|Current portion of deferred revenue                                                                    |  |               | 9,923    |   |                  |   | 11,637   |  
|Current portion of long-term debt                                                                      |  |               | 3,565    |   |                  |   | 3,565    |  
|                                                                                                       |  |               |          |   |                  |   |          |  
|Total current liabilities                                                                              |  |               | 24,613   |   |                  |   | 23,211   |  
|                                                                                                       |  |              
|Long-term debt, net of current portion                                                                 |  |               | 1,782    |   |                  |   | 2,673    |  
|Other long-term liabilities                                                                            |  |               | 1,320    |   |                  |   | 1,288    |  
|                                                                                                       |  |               |          |   |                  |   |          |  
|Total liabilities                                                                                      |  |               | 27,715   |   |                  |   | 27,172   |  
|                                                                                                       |  |               |          |   |                  |   |          |  
|                                                                                                       |  |              
|Commitments and contingencies (Note 7)                                                                 |  |               |          |   |                  |   |          |  
|                                                                                                       |  |              
|Stockholders equity:                                                                                  |  |               |          |   |                  |   |          |  
|Preferred stock, par value $0.0001:                                                                    |  |               |          |   |                  |   |          |  
|Authorized: 10,000,000 shares                                                                          |  |               |          |   |                  |   |          |  
|Issued and outstanding: none                                                                           |  |               |         |   |                  |   |         |  
|Common stock, par value $0.0001:                                                                       |  |               |          |   |                  |   |          |  
|Authorized: 100,000,000 shares                                                                         |  |               |          |   |                  |   |          |  
|Issued and outstanding: 54,543 and 53,901 shares at March 31, 2011 and December 31, 2010,
respectively |  |               | 5        |   |                  |   | 5        |  
|Additional paid-in capital                                                                             |  |               | 291,567  |   |                  |   | 289,219  |  
|Accumulated other comprehensive income (loss)                                                          |  |               | 751      |   |                  |   | (367     | )
|Accumulated deficit                                                                                    |  |               | (246,408 | ) |                  |   | (258,085 | )
|                                                                                                       |  |               |          |   |                  |   |          |  
|Total stockholders equity                                                                             |  |               | 45,915   |   |                  |   | 30,772   |  
|                                                                                                       |  |               |          |   |                  |   |          |  
|Total liabilities and stockholders equity                                                             |  | $             | 73,630   |   |                  | $ | 57,944   |  
|                                                                                                       |  |               |          |   |                  |   |          |  

The accompanying notes are an integral part of these condensed consolidated financial statements.



1



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##### Table of Contents

HANSEN MEDICAL, INC.

Condensed Consolidated Statements of Operations

(Unaudited)

(In thousands, except per share data)



|                                                    |  |                              |        |   |      |   |         |  
|--------------------------------------------------- |  | ---------------------------- | ------ | - | ---- | - | ------- | -
|                                                    |  | Three months ended March 31, |       
|                                                    |  | 2011                         |        |   | 2010 |  
|Revenues:                                           |  |                              |        |   |      |   |         |  
|Product                                             |  | $                            | 3,903  |   |      | $ | 1,613   |  
|Service                                             |  |                              | 1,376  |   |      |   | 1,098   |  
|                                                    |  |                              |        |   |      |   |         |  
|Total revenues                                      |  |                              | 5,279  |   |      |   | 2,711   |  
|Cost of revenues:                                   |  |                              |        |   |      |   |         |  
|Product                                             |  |                              | 3,769  |   |      |   | 2,855   |  
|Service                                             |  |                              | 693    |   |      |   | 715     |  
|                                                    |  |                              |        |   |      |   |         |  
|Total cost of revenues                              |  |                              | 4,462  |   |      |   | 3,570   |  
|                                                    |  |                              |        |   |      |   |         |  
|Gross profit (loss)                                 |  |                              | 817    |   |      |   | (859    | )
|                                                    |  |                              |        |   |      |   |         |  
|Operating expenses:                                 |  |                              |        |   |      |   |         |  
|Research and development                            |  |                              | 4,185  |   |      |   | 4,767   |  
|Selling, general and administrative                 |  |                              | 8,044  |   |      |   | 7,731   |  
|Gain on settlement of litigation (Note 6)           |  |                              |       |   |      |   | (10,003 | )
|                                                    |  |                              |        |   |      |   |         |  
|                                                    |  |                             
|Total operating expenses                            |  |                              | 12,229 |   |      |   | 2,495   |  
|                                                    |  |                             
|Gain on sale of intellectual property (Note 5)      |  |                              | 23,000 |   |      |   |        |  
|                                                    |  |                              |        |   |      |   |         |  
|                                                    |  |                             
|Income (loss) from operations                       |  |                              | 11,588 |   |      |   | (3,354  | )
|Interest income                                     |  |                              | 92     |   |      |   | 128     |  
|Interest and other expense, net                     |  |                              | (3     | ) |      |   | (620    | )
|                                                    |  |                              |        |   |      |   |         |  
|Net income (loss)                                   |  | $                            | 11,677 |   |      | $ | (3,846  | )
|                                                    |  |                              |        |   |      |   |         |  
|Net income (loss) per share:                        |  |                              |        |   |      |   |         |  
|Basic                                               |  | $                            | 0.22   |   |      | $ | (0.10   | )
|                                                    |  |                              |        |   |      |   |         |  
|Diluted                                             |  | $                            | 0.21   |   |      | $ | (0.10   | )
|                                                    |  |                              |        |   |      |   |         |  
|Shares used to compute net income (loss) per share: |  |                              |        |   |      |   |         |  
|Basic                                               |  |                              | 54,098 |   |      |   | 37,540  |  
|                                                    |  |                              |        |   |      |   |         |  
|Diluted                                             |  |                              | 55,452 |   |      |   | 37,540  |  
|                                                    |  |                              |        |   |      |   |         |  

The accompanying notes are an integral part of these condensed consolidated financial statements.



2



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HANSEN MEDICAL, INC.

Condensed Consolidated Statements of Cash Flows

(Unaudited)

(in thousands)



|                                                                                     |  |                             |         |   |      |   |         |  
|------------------------------------------------------------------------------------ |  | --------------------------- | ------- | - | ---- | - | ------- | -
|                                                                                     |  | Three months
endedMarch 31, |        
|                                                                                     |  | 2011                        |         |   | 2010 |  
|Cash flows from operating activities:                                                |  |                             |         |   |      |   |         |  
|Net income (loss)                                                                    |  | $                           | 11,677  |   |      | $ | (3,846  | )
|Adjustments to reconcile net income (loss) to net cash used in operating activities: |  |                             |         |   |      |   |         |  
|Gain on sale of intellectual property                                                |  |                             | (23,000 | ) |      |   |        |  
|Gain on settlement of litigation                                                     |  |                             |        |   |      |   | (10,003 | )
|Depreciation and amortization                                                        |  |                             | 915     |   |      |   | 1,021   |  
|Stock-based compensation                                                             |  |                             | 2,286   |   |      |   | 1,294   |  
|Loss on disposal of fixed assets                                                     |  |                             | 4       |   |      |   |        |  
|Unrealized (gains) losses on investments                                             |  |                             | (123    | ) |      |   | 282     |  
|Provision for doubtful accounts                                                      |  |                             |        |   |      |   | (29     | )
|Changes in operating assets and liabilities:                                         |  |                             |         |   |      |   |         |  
|Accounts receivable                                                                  |  |                             | (339    | ) |      |   | 1,541   |  
|Inventories                                                                          |  |                             | (28     | ) |      |   | 715     |  
|Deferred cost of goods sold                                                          |  |                             | 733     |   |      |   | (690    | )
|Prepaids and other current assets                                                    |  |                             | (61     | ) |      |   | (1,326  | )
|Other long-term assets                                                               |  |                             | (5      | ) |      |   | 12      |  
|Accounts payable                                                                     |  |                             | (1,375  | ) |      |   | 1,045   |  
|Accrued liabilities                                                                  |  |                             | 4,504   |   |      |   | 248     |  
|Deferred revenue                                                                     |  |                             | (1,714  | ) |      |   | 2,726   |  
|Deferred rent                                                                        |  |                             | 8       |   |      |   | (16     | )
|Other long-term liabilities                                                          |  |                             | 37      |   |      |   | 476     |  
|                                                                                     |  |                             |         |   |      |   |         |  
|Net cash used in operating activities                                                |  |                             | (6,481  | ) |      |   | (6,550  | )
|                                                                                     |  |                             |         |   |      |   |         |  
|Cash flows from investing activities:                                                |  |                             |         |   |      |   |         |  
|Purchase of property and equipment                                                   |  |                             | (90     | ) |      |   | (141    | )
|Proceeds from sales and maturities of short-term investments                         |  |                             |        |   |      |   | 9,801   |  
|Purchase of investments                                                              |  |                             | (7,492  | ) |      |   | (5,039  | )
|Proceeds from sale of intellectual property                                          |  |                             | 23,000  |   |      |   |        |  
|Collection of note receivable                                                        |  |                             | 291     |   |      |   |        |  
|                                                                                     |  |                             |         |   |      |   |         |  
|Net cash provided by investing activities                                            |  |                             | 15,709  |   |      |   | 4,621   |  
|                                                                                     |  |                             |         |   |      |   |         |  
|Cash flows from financing activities:                                                |  |                             |         |   |      |   |         |  
|Repayments of loans payable                                                          |  |                             | (891    | ) |      |   | (891    | )
|Proceeds from exercise of common stock options, net                                  |  |                             | 62      |   |      |   | 47      |  
|                                                                                     |  |                             |         |   |      |   |         |  
|Net cash used in financing activities                                                |  |                             | (829    | ) |      |   | (844    | )
|                                                                                     |  |                             |         |   |      |   |         |  
|Net increase (decrease) in cash and cash equivalents                                 |  |                             | 8,399   |   |      |   | (2,773  | )
|Cash and cash equivalents at beginning of period                                     |  |                             | 25,769  |   |      |   | 9,553   |  
|                                                                                     |  |                             |         |   |      |   |         |  
|Cash and cash equivalents at end of period                                           |  | $                           | 34,168  |   |      | $ | 6,780   |  
|                                                                                     |  |                             |         |   |      |   |         |  

The accompanying notes are an integral part of these condensed consolidated financial statements.



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##### Table of Contents

HANSEN MEDICAL, INC.

Notes to Condensed Consolidated Financial Statements

(Unaudited)



|1. | Description of Business
|-- | -----------------------

Hansen Medical, Inc. (the Company) develops, manufactures and markets a new generation of medical robotics designed for accurate positioning, manipulation and stable control of catheters and
catheter-based technologies. The Company was incorporated in the state of Delaware on September 23, 2002. The Company is headquartered in Mountain View, California. In March 2007, the Company established Hansen Medical UK Ltd., a wholly-owned
subsidiary located in the United Kingdom and, in May 2007, the Company established Hansen Medical, GmbH, a wholly-owned subsidiary located in Germany. Both subsidiaries are engaged in marketing the Companys products in Europe.

Prior to the second quarter of 2007, the Company was a development stage company that devoted substantially all of its
resources to recruiting personnel, developing its product technology, obtaining patents to protect its intellectual property and raising capital. The Company received CE Mark approval for its Sensei system in the fourth quarter of 2006 and, in the
second quarter of 2007, received CE Mark approval for its Artisan catheters and also received U.S. Food & Drug Administration (FDA) clearance for the marketing of its Sensei system and Artisan catheters for manipulation,
positioning and control of certain mapping catheters during electrophysiology procedures. As a result of obtaining the necessary regulatory approvals, the Company recorded its initial product revenues in the second quarter of 2007, thus commencing
its planned principal operations and exiting the development stage.

The Company completed its initial public
offering of stock (IPO) on November 15, 2006. The IPO consisted of 7,187,500 shares of the Companys common stock and produced net proceeds of $78.3 million, after expenses and underwriters discounts and commissions. On
April 7, 2008, the Company sold an additional 3,000,000 shares of its common stock, resulting in net proceeds of approximately $39.5 million. On April 22, 2009, the Company sold 11,692,000 shares of its common stock, resulting in
approximately $35.3 million of net proceeds, after underwriting discounts and commissions and offering expenses. On April 20, 2010, the Company sold 16,100,000 shares of its common stock, resulting in approximately $29.8 million of net
proceeds, after underwriting discounts and commissions and offering expenses. On August 25, 2008, the Company entered into a $25 million loan and security agreement with Silicon Valley Bank, consisting of a $15 million term equipment line and a
one-year $10 million revolving credit line. The revolving credit line expired in August 2009. As of March 31, 2011, the Company had drawn down approximately $12.5 million against the term equipment line under this agreement, of which $5.3
million was outstanding at March 31, 2011. See Note 8.

From inception to March 31, 2011, the
Company has incurred losses totaling approximately $246.4 million and has not generated positive cash flows from operations for any year. The Company expects such losses to continue through at least the year ended December 31, 2011 as it
continues to commercialize its technologies and develop new applications and technologies. The Company also faces significant short-term uncertainty related to current economic and capital market conditions and the related impact of those conditions
on the capital equipment market. The Company also faces uncertainty related to the development and commercialization of its new robotic platform for use in the arterial and venous vascular systems (the Vascular System). While the Company
expects to continue to use cash in operations, the Company believes its existing cash, cash equivalents and short-term investment balances as of March 31, 2011, the interest income it will earn on these balances in addition to funding amounts
expected to be received from Philips under the extended joint development agreement and the estimated amounts received through the sale of the Company products will be sufficient to meet its anticipated cash requirements for at least the next twelve
months. However, the Company may decide to raise additional funding by selling equity or debt securities, entering into future research and development funding arrangements or entering into a credit facility in order to meet its continuing cash
needs. If such financing or funding arrangements, which may occur at any time, do not meet the Companys longer term needs or if cash flows from operating activities are significantly less than expected, the Company may be required to adopt
additional cost-cutting measures, including additional reductions in its work force, reducing the scope of, delaying or eliminating some or all of its planned research, development and commercialization activities and/or reducing marketing, customer
support or other resources devoted to the Companys products. Any of these factors could harm the Companys financial condition. Failure to raise additional funding or manage spending may adversely impact the Companys ability to
achieve its long term intended business objectives. The Company will continue to evaluate the extent of its implemented cost-saving measures based upon changing future economic conditions and the achievement of estimated revenue and will consider
the implementation of additional cost reductions if and as circumstances warrant.



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##### Table of Contents

|2. | Summary of Significant Accounting Policies
|-- | ------------------------------------------

Basis of Presentation

The Company has prepared the accompanying consolidated financial statements in conformity with accounting principles
generally accepted in the United States of America (GAAP). The accompanying condensed consolidated financial statements and notes thereto are unaudited. In the opinion of the Companys management, these statements include all
adjustments, which are of a normal recurring nature, necessary to present a fair presentation. The Companys fiscal year ends on December 31. Interim results are not necessarily indicative of results for a full year or any other interim
period. The condensed consolidated balance sheet as of December 31, 2010 was derived from audited financial statements, but does not include all disclosures required by GAAP. The information included in this Form 10-Q should be read in
conjunction with the Companys Annual Report on Form 10-K for the year ended December 31, 2010 as filed with the Securities and Exchange Commission.

The accompanying condensed consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. All significant intercompany balances and transactions have been
eliminated in consolidation.

Use of Estimates

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that
affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Cash Flow Presentation for the Quarter ended March 31, 2010

Subsequent to the issuance of the March 31, 2010 condensed consolidated financial statements, the Company identified certain classification errors between proceeds from sales and maturities of short-term
investments and purchases of investments within the condensed consolidated statement of cash flows for the quarter ended March 31, 2010. The Company has corrected the previously presented classification errors as reflected in the following table (in
thousands). The correction had no effect on the previously presented net cash provided by investing activities.



|                                                             |  |                      |        |   |             |   |        |  
|------------------------------------------------------------ |  | -------------------- | ------ | - | ----------- | - | ------ | -
|                                                             |  | AsPreviouslyReported |        |   | AsCorrected |  
|Cash Flows From Investing Activities                         |  |                      |        |   |             |   |        |  
|Purchase of property and equipment                           |  | $                    | (141   | ) |             | $ | (141   | )
|Proceeds from sales and maturities of short-term investments |  |                      | 14,474 |   |             |   | 9,801  |  
|Purchase of investments                                      |  |                      | (9,712 | ) |             |   | (5,039 | )
|                                                             |  |                      |        |   |             |   |        |  
|Net cash provided by investing activities                    |  | $                    | 4,621  |   |             | $ | 4,621  |  
|                                                             |  |                      |        |   |             |   |        |  



5



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##### Table of Contents

Revenue Recognition

The Companys revenues are primarily derived from the sale of the Sensei Robotic Catheter System (Sensei
system) and the associated catheters as well as the sale of post-contract customer service. Prior to January 1, 2011, as computer software was more than incidental to the functioning of those products, the Companys revenue
recognition policy was based on authoritative guidance regarding software revenue recognition. However, in October 2009, the Financial Accounting Standards Board issued authoritative guidance related to certain revenue arrangements that include
software elements and revenue arrangements with multiple deliverables. This guidance became effective for the Company beginning January 1, 2011 and changes the way that the Company accounts for certain revenue arrangements that include multiple
deliverables. In general, the new guidance allows certain elements to be recognized as revenue earlier than under the previous guidance. The Company is adopting the revised guidance through prospective application, wherein all revenue arrangements
entered into or materially modified after January 1, 2011 are accounted for under the revised guidance and any revenue arrangements which were entered into prior to January 1, 2011 and for which there is still unrecognized revenue will
continue to be accounted for under the previous guidance. Had the Company recognized revenue in the first quarter of 2011 consistent with the guidance used to recognize revenues in periods previous to January 1, 2011, product revenue for the
first quarter of 2011 would have been $3,505,000.

The Company recognizes revenue when persuasive evidence of
an arrangement exists, delivery to the customer has occurred or the services have been fully rendered, the sales price is fixed or determinable and collectability is probable.



| |  |  | Persuasive Evidence of an Arrangement.  Persuasive evidence of an arrangement for sales of Sensei systems is generally determined
by a sales contract signed and dated by both the customer and the Company, including approved terms and conditions and the receipt of an approved purchase order. Evidence of an arrangement for the sale of disposable products is determined through an
approved purchase order from the customer. Evidence of an arrangement for the sale of post-contract customer service is determined through either a signed sales contract or an approved purchase order from the customer.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Delivery.
| | - |  | ---------



| |  |  | Multiple-element Arrangements.  Typically, all products and services sold to customers are itemized and priced separately. In
arrangements that include multiple elements, the Company allocates revenue to the various elements based on vendor-specific objective evidence of fair value (VSOE) of the elements if VSOE exists. VSOE for each element is based on the
price for which the item is sold separately, determined based on historical evidence of stand-alone sales of these elements or stated renewal rates for the element. If VSOE does not exist for an element, the Company allocates revenue based on
third-party evidence (TPE) of selling price for the elements if TPE exists. TPE is the price of the Companys or any competitors largely interchangeable products or services in standalone sales to similarly situated customers.
If neither VSOE nor TPE exist for a specific element, the Company allocates revenue to the various elements based on its best estimate of the selling price for that element or estimated selling price (ESP) using a top-down approach,
which takes into account the Companys target price and overall pricing objectives. In situations where the Company has delivered certain elements but not delivered other elements, the Company, after it has allocated revenue to the various
elements based on VSOE, TPE or ESP, defers revenue for the undelivered elements. Prior to January 1, 2011, the Company allocated revenue to the various elements under the relative selling price method based solely on VSOE of the elements. When
contracts contained multiple elements wherein VSOE existed for all undelivered elements, the residual method prescribed by authoritative guidance regarding software revenue recognition was used to account for the delivered elements. Under the
residual method, the full VSOE of the undelivered element was deferred until that element was delivered and any residual revenue was then recognized. When the Company could not reasonably determine the VSOE of an undelivered element, the entire
arrangement fee was deferred until all elements were delivered. If the Company could not establish VSOE for an element of the arrangement and the only undelivered element was post-contract customer support (PCS), the arrangement fee was
recognized ratably over the term of the PCS. If the Company could not establish VSOE except for PCS, revenue was recognized under the residual method when the only remaining undelivered element was PCS. For all periods presented through
December 31, 2010, the Company did not have VSOE for training and installation services, but did have VSOE for PCS and recognized revenue once the only undelivered element was PCS.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



6



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| |  |  | Systems. Typically, ownership of the Sensei system passes to customers upon shipment, at which time delivery is deemed to be complete.
Substantially all of the sales contracts for systems include installation and training. Prior to January 1, 2011, as these services were not deemed to be perfunctory and the Company had not established VSOE for these elements, all such system
revenue was deferred until training and installation were completed.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Disposable Products. Ownership of the catheters and other disposable products typically passes to customers upon shipment, at which time
delivery is deemed to be complete.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Post-contract Customer Service Revenue. The Company recognizes post-contract customer service revenue from the sale of product maintenance
plans. Revenue from post-contract customer services, whether sold individually or as a separate unit of accounting in a multi-element arrangement, is deferred and amortized over the service period, which is typically one year.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Sales Price Fixed or Determinable. The Company assesses whether the sales price is fixed or determinable at the time of the transaction.
Sales prices are documented in the executed sales contract or purchase order received prior to shipment. If a significant portion of the sales price is considered to have extended payment terms, the sales price is accounted for as not being fixed or
determinable and revenue is recognized as payments become due. The Companys standard terms do not allow for contingencies, such as trial or evaluation periods, refundable orders, payments contingent upon the customer obtaining financing or
other contingencies which would impact the customers obligation. In situations where contingencies such as those identified are included, all related revenue is deferred until the contingency is resolved.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Collectability. The Company assesses whether collection is probable based on a number of factors, including the customers past
transaction history and credit worthiness. If collection of the sales price is not deemed probable, the revenue is deferred and recognized at the time collection becomes probable, which is usually upon receipt of cash. The Companys sales
contracts generally do not allow the customer the right of cancellation, refund or return, except as provided under the Companys standard warranty. If such rights were allowed, all related revenues would be deferred until such rights expired.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Significant management judgments and estimates are made in connection with the
determination of revenue to be recognized and the period in which it is recognized. If different judgments and estimates were utilized, the amount of revenue to be recognized and the period in which it is recognized could differ materially from the
amounts reported.

Recent Accounting Pronouncements

The Company has determined that there have been no recently issued accounting standards that will have a material impact
on its Condensed Consolidated Financial Statements.



7



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|3. | Investments and Fair Value Measurements
|-- | ---------------------------------------

The amortized cost and fair value of investments, with gross unrealized gains and losses, were as follows (in thousands):



|                                  |  |               |        |  |                      |                 |     |                       |                       |   |            |   |  |                              |        |  |  |   |        |  |  |   |        | 
|--------------------------------- |  | ------------- | ------ |  | -------------------- | --------------- | --- | --------------------- | --------------------- | - | ---------- | - |  | ---------------------------- | ------ |  |  | - | ------ |  |  | - | ------ | 
|                                  |  | AmortizedCost |        |  | GrossUnrealizedGains |                 |     | GrossUnrealizedLosses |                       |   | Fair Value |   |  | Balance Sheet Classification |       
|                                  |  |               |        |  |                      | CashEquivalents |     |                       | Short-termInvestments |  
|March 31, 2011:                   |  |               |        |  |                      |                 |     |                       |                       |   |            |   |  |                              |        |  |  |   |        |  |  |   |        | 
|Money market funds                |  | $             | 658    |  |                      | $               |    |                       |                       | $ |           |   |  | $                            | 658    |  |  | $ | 658    |  |  | $ |       | 
|U.S. government agency securities |  |               | 7,481  |  |                      |                 | 2   |                       |                       |   | (2         | ) |  |                              | 7,481  |  |  |   |       |  |  |   | 7,481  | 
|Corporate debt securities         |  |               | 31,481 |  |                      |                 |    |                       |                       |   |           |   |  |                              | 31,697 |  |  |   | 31,697 |  |  |   |       | 
|Corporate equity securities       |  |               | 2,495  |  |                      |                 | 789 |                       |                       |   |           |   |  |                              | 3,284  |  |  |   |       |  |  |   | 3,284  | 
|                                  |  |               |        |  |                      |                 |     |                       |                       |   |            |   |  |                              |        |  |  |   |        |  |  |   |        | 
|                                  |  | $             | 42,331 |  |                      | $               | 791 |                       |                       | $ | (2         | ) |  | $                            | 43,120 |  |  | $ | 32,355 |  |  | $ | 10,765 | 
|                                  |  |               |        |  |                      |                 |     |                       |                       |   |            |   |  |                              |        |  |  |   |        |  |  |   |        | 
|                                  |  |               |        |  |                      |                
|December 31, 2010:                |  |               |        |  |                      |                 |     |                       |                       |   |            |   |  |                              |        |  |  |   |        |  |  |   |        | 
|Money market funds                |  | $             | 872    |  |                      | $               |    |                       |                       | $ |           |   |  | $                            | 872    |  |  | $ | 872    |  |  | $ |       | 
|U.S. government agency securities |  |               | 5,006  |  |                      |                 |    |                       |                       |   |           |   |  |                              | 5,006  |  |  |   | 5,006  |  |  |   |       | 
|Corporate debt securities         |  |               | 16,053 |  |                      |                 |    |                       |                       |   | (1         | ) |  |                              | 16,052 |  |  |   | 16,052 |  |  |   |       | 
|Corporate equity securities       |  |               | 2,495  |  |                      |                 | 108 |                       |                       |   | (412       | ) |  |                              | 2,191  |  |  |   |       |  |  |   | 2,191  | 
|                                  |  |               |        |  |                      |                 |     |                       |                       |   |            |   |  |                              |        |  |  |   |        |  |  |   |        | 
|                                  |  | $             | 24,426 |  |                      | $               | 108 |                       |                       | $ | (413       | ) |  | $                            | 24,121 |  |  | $ | 21,930 |  |  | $ | 2,191  | 
|                                  |  |               |        |  |                      |                 |     |                       |                       |   |            |   |  |                              |        |  |  |   |        |  |  |   |        | 

The Company periodically assesses whether significant facts and circumstance have arisen to
indicate that an impairment, that is other than temporary, of the fair value of any underlying investment has occurred. As of March 31, 2011, investments which are in an unrealized loss position are summarized as follows (in thousands):



|                                                 |  |            |       |  |                       |   |      |  
|------------------------------------------------ |  | ---------- | ----- |  | --------------------- | - | ---- | -
|                                                 |  | Fair Value |       |  | GrossUnrealizedLosses |  
|U.S government agency securities                 |  | $          | 2,556 |  |                       | $ | (2   | )
|Warrants to purchase corporate equity securities |  |            | 287   |  |                       |   | (296 | )
|                                                 |  |            |       |  |                       |   |      |  
|                                                 |  | $          | 2,843 |  |                       | $ | (298 | )
|                                                 |  |            |       |  |                       |   |      |  

None of the above fixed income securities have contractual maturities of more than one year
and no investments have been in an unrealized loss position for longer than twelve months.

The gross
unrealized losses on fixed income securities were due primarily to changes in interest rates and other market conditions as well as to changes in the credit conditions of the underlying securities. These investments are not considered
other-than-temporarily impaired as the gross losses are minor and the Company has the ability to hold these investments until maturity or until a recovery of fair value occurs. The warrants to purchase corporate equity securities are derivatives
and, therefore, unrealized gains and losses are recorded in earnings, regardless of whether any impairment is other than temporary.

Fair Value Measurements

GAAP defines fair value as
an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based
on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, authoritative guidance establishes a three-tier value hierarchy, which prioritizes the inputs used in measuring fair
value as follows:



8



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##### Table of Contents

|                    |  |                                                                                                                          
|------------------- |  | -------------------------------------------------------------------------------------------------------------------------
|    Level 1 Inputs |  | Quoted prices (unadjusted) in active markets for identical assets or liabilities.                                        
|                    | 
|    Level 2 Inputs |  | Inputs other than quoted prices in active markets that are observable either directly or indirectly.                     
|                    | 
|    Level 3 Inputs |  | Unobservable inputs in which there is little or no market data, which require the Company to develop its own assumptions.

This hierarchy requires the use of observable market data when available and to minimize the use of unobservable inputs
when determining fair value. Investment instruments valued using Level 1 inputs include money market securities, U.S. government agency securities and certain of the corporate equity securities which were obtained by the Company as part of the Luna
litigation settlement for which there is now not a significant non-marketability issue.

Investment
instruments valued using Level 2 inputs include investment-grade corporate debts, such as bonds and commercial paper. The fair value of these investments is determined based on modeling techniques that include inputs such as the credit rating of the
company issuing the debt and the observable market value of similarly-termed corporate debts with similar credit ratings.

The warrants to purchase corporate equity securities obtained as a part of the Luna litigation settlement and corporate equity securities obtained upon the exercise of certain of those warrants are valued
using Level 3 inputs. The warrant to purchase corporate equity securities was valued based on an estimate of the number of shares which will be issued over the three-year life of the warrant. The estimated shares were valued utilizing the
Black-Scholes option pricing model. The corporate equity securities obtained upon the exercise of certain of those warrants are initially unregistered and their valuation consists of the quoted stock price adjusted for the impact of the
non-marketability. The non-marketability discount was determined based primarily on an analysis utilizing the Black-Scholes model to value a hypothetical put option to approximate the cost of hedging the restricted stock over the expected period of
non-marketability, which was then corroborated by reviewing published restricted stock studies.

The fair
value hierarchy of the Companys cash equivalents and short-term investments at March 31, 2011 is as follows (in thousands):



|                                                 |  |                                                                   |        |  |                                                   |   |        |                     |  |   |       |  |  |   |        | 
|------------------------------------------------ |  | ----------------------------------------------------------------- | ------ |  | ------------------------------------------------- | - | ------ | ------------------- |  | - | ----- |  |  | - | ------ | 
|                                                 |  | Fair Value Measurements Using                                     |        |  |                                                   |  
|                                                 |  | Quoted Pricesin ActiveMarkets forIdentical
Assets(Level 1 Inputs) |        |  | Significant otherObservableInputs(Level 2 Inputs) |   |        | (Level 3    Inputs) |  |   | Total | 
|Money market funds                               |  | $                                                                 | 658    |  |                                                   | $ |       |                     |  | $ |      |  |  | $ | 658    | 
|U.S. government agency securities                |  |                                                                   | 7,481  |  |                                                   |   |       |                     |  |   |      |  |  |   | 7,481  | 
|Corporate debt securities                        |  |                                                                   |       |  |                                                   |   | 31,697 |                     |  |   |      |  |  |   | 31,697 | 
|Corporate equity securities                      |  |                                                                   | 3,216  |  |                                                   |   |       |                     |  |   | 68    |  |  |   | 3,284  | 
|Warrants to purchase corporate equity securities |  |                                                                   |       |  |                                                   |   |       |                     |  |   | 287   |  |  |   | 287    | 
|                                                 |  |                                                                   |        |  |                                                   |   |        |                     |  |   |       |  |  |   |        | 
|                                                 |  | $                                                                 | 11,355 |  |                                                   | $ | 31,697 |                     |  | $ | 355   |  |  | $ | 43,407 | 
|                                                 |  |                                                                   |        |  |                                                   |   |        |                     |  |   |       |  |  |   |        | 



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|4. | Inventories (in thousands)
|-- | --------------------------



|                |  |               |       |  |                  |   |       | 
|--------------- |  | ------------- | ----- |  | ---------------- | - | ----- | 
|                |  | March 31,2011 |       |  | December 31,2010 |  
|Raw materials   |  | $             | 2,920 |  |                  | $ | 2,669 | 
|Work in process |  |               | 2,305 |  |                  |   | 2,311 | 
|Finished goods  |  |               | 1,035 |  |                  |   | 1,252 | 
|                |  |               |       |  |                  |   |       | 
|Inventories     |  | $             | 6,260 |  |                  | $ | 6,232 | 
|                |  |               |       |  |                  |   |       | 



|5. | Agreements with Philips
|-- | -----------------------

In February 2011, the Company entered, directly and through a wholly-owned subsidiary, into patent and technology license, sublicense and purchase agreements with Philips Medical Systems Nederland B.V., a
Philips Healthcare company (Philips) to allow them to develop and commercialize the non-robotic applications of the Companys Fiber Optic Shape Sensing and Localization (FOSSL) technology. Under the terms of the agreements, Philips
has the exclusive right to develop and commercialize the FOSSL technology in the non-robotic vascular, endoluminal and orthopedic fields. Philips also receives non-exclusive rights in other non-robotic medical device fields, but not to any
multi-degree of freedom robotic applications. If Philips does not meet certain specified commercialization obligations, the Company has the rights to re-acquire the licenses granted to Philips for pre-determined payments. The agreement also contains
customary representations, warranties and indemnification provisions by each party. Each party may terminate the agreements for material breach by the other party. Also in February 2011, the Company amended its extended joint development agreement
with Philips, increasing the amount of funding provided by Philips for the development of the Vascular System and potentially extending and increasing certain royalty fees to be paid to Philips based on sales of the Vascular System, subject to caps
based on the amounts Philips contributes to the development of the system. In connection with the agreements, the Company received upfront payments of $29.0 million and will be eligible to receive up to an additional $78.0 million in future payments
associated with the successful commercialization by Philips or its collaborators of products containing FOSSL technology.

The Company allocated the arrangement consideration into two units of accounting based on their relative fair values; the licensing of intellectual property and the amendment of the extended joint
development agreement. The two units were valued using discounted cash flows based on projections of potential income and associated costs. Based on these valuations, the Company allocated $23.0 million of the upfront payments to the sale of the
intellectual property and $6.0 million to the extension of the extended joint development agreement. The $23.0 million associated with the sale of intellectual property was recognized immediately in net income. The $6.0 million associated with the
amendment of the extended joint development agreement will be recognized as a reduction of research and development costs ratably as milestones are met through the end of the term of the agreement, which is estimated to be September 2011, consistent
with how it has been accounting for existing funding received under the extended joint development agreement. In connection with the extended joint development agreement, the Company recognized reductions to its research and development expenses of
$2,021,000 and $188,000 for the three months ended March 31, 2011 and 2010, respectively. As of March 31, 2011, the Companys accrued liabilities included $5,542,000 related to funding received from Philips but not yet recognized as
reductions to research and development costs.



|6. | Litigation Settlement
|-- | ---------------------

On January 12, 2010, the Company entered into a series of agreements with Luna Innovations Incorporated and its wholly-owned subsidiary which settled the outstanding litigation between the two
companies. According to the terms of the agreements, Luna issued the following to the Company:



| |  |  | 1,247,330 shares of common stock, which at the time of the settlement gave the Company ownership of 9.9% of outstanding Luna common stock.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | A three-year warrant to purchase, from time to time, a number of shares of Luna common stock, at a purchase price of $0.01 per share, such that the
total number of shares issuable under the warrant plus the 1,247,330 shares issued above will continue to equal 9.9% of Lunas shares of common stock outstanding over that period. The warrant contains a net exercise provision and is
exercisable for three years after January 12, 2010. Neither the warrant nor the shares issuable upon exercise of the warrant have been registered with the Securities and Exchange Commission. As of March 31, 2011, the Company had exercised
warrants to purchase approximately 85,000 shares of Luna common stock.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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| |  |  | A secured promissory note in the principal amount of $5,000,000. Payment of principal and interest will be made in 16 equal consecutive installments
of principal and interest commencing April 13, 2010. Subsequent installments will be payable on the last business day of each July, October, January and April of each calendar year thereafter, with the last such payment to be due and payable on
January 31, 2014. The outstanding principal amount under the note will accrue interest at 8.5 percent per annum, payable quarterly in arrears. Luna may prepay, in whole or in part, the outstanding amount of the note without premium or penalty.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Additionally, Hansen and Luna entered into a Development and Supply Agreement, under which
Luna will develop for the Company a localization and shape sensing solution for the Companys medical robotics system in accordance with the agreed-upon development plan and development milestones, for which the Company will pay Luna for
Lunas development work based on certain agreed upon rates and budgets. The rates charged are equivalent to rates Luna charges for development work under government contracts. Luna will also manufacture and supply the Company with products
developed under the agreement at certain agreed-upon pricing. Certain amounts billed under the Development and Supply Agreement in excess of a quarterly limit will be settled by a corresponding reduction of the principal of the $5 million note.
Through March 31, 2011 the principal of the note has been reduced by approximately $358,000 in accordance with these terms.

Under the agreements, Luna granted Hansen a co-exclusive (with Intuitive Surgical, Inc., (Intuitive)), royalty-free, fully paid, perpetual and irrevocable license to Lunas fiber optic
shape sensing and localization technology within the medical robotics field and a royalty-free, fully paid, perpetual and irrevocable license to Lunas fiber optic shape sensing and localization technology for non-robotic medical devices. At
the time of the settlement, the Company could not establish a stand-alone value for this technology at its then-current state of development and, as such, did not record a value associated with this technology.

Common Stock

Upon execution of these agreements, Luna issued approximately 1.2 million shares of common stock to the Company. These shares were not registered with the Securities and Exchange Commission and could
not be resold except pursuant to an effective registration statement under the Securities Act or an available exemption from registration. These shares were restricted during the initial six months from the date of issuance. The fair value of the
shares recorded should reflect the value that market participants would demand due to the value of the shares and the risk relating to the inability to access a public market for these securities for the specified period. The fair value of the
unregistered shares was determined as of the market closing price on the dates the shares were issued less a 20% non-marketability discount, for a total value of $4.4 million.

The Company concluded that 20% was an appropriate discount based primarily on an analysis utilizing the Black-Scholes
model to value a hypothetical put option to approximate the cost of hedging the restricted stock over the expected period of non-marketability. This approach calculated the amount required to buy the right to sell the presently restricted stock at
the then-current market price on the date the holder can count on the shares becoming salable on the public exchange. The assumptions input into the Black-Scholes option pricing model were based on the stock price on the date of the share issuance,
an expected term of eight months, expected volatility of 59%, risk-free interest rate of 0.14% and no expected dividends.

The Company corroborated the conclusion indicated by the Black-Scholes model by assessing that the discount was generally consistent with the ranges noted from published restricted stock studies and
comparable to discounts on restricted stock transactions completed by other companies operating in similar industries as Luna. The valuation of the shares at March 31, 2011 no longer includes this 20% discount as the original six-month
restriction period has ended.



11



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##### Table of Contents

The Company recorded the shares as a short-term available-for-sale security
which will be marked to market each reporting period with temporary unrealized gains and losses recorded in accumulated other comprehensive income/loss in the equity section of the balance sheet. In the third quarter of 2010, the recorded value of
these shares was reduced by $1.9 million as the impairment of the market value of Luna stock was determined to be other than temporary. If a further reduction in the value of the shares occurs and is considered other than temporary, any such
impairment will be recorded as a non-operating expense.

Warrant to Purchase Common Stock

The warrant to purchase shares of common stock was valued based on an estimate of the number of shares which will be
issued over the three-year life of the warrant. The number of shares were valued utilizing the Black-Scholes option pricing model based on the stock price on the date of the agreements, expected terms ranging from three months to three years,
expected volatility ranging from 53% to 75%, risk-free interest rates ranging from 0.05% to 1.5% and no expected dividends. Shares received upon exercise of warrants are not registered with the Securities and Exchange Commission and cannot be resold
except pursuant to an effective registration statement under the Securities Act or an available exemption from registration. Shares received upon exercise of warrants are expected to become salable six months after the date of issuance of the
shares. The value of the shares issued is reduced by a marketability discount to arrive at an estimated fair value until the end of the six month period. The total estimated fair value of the warrant was calculated at $583,000 at the date of
issuance.

The Company determined that the warrant was a derivative instrument and will be marked to market
each reporting period with unrealized gains and losses recorded as non-operating income or expense.

Summary

Total amounts recorded in relation to the settlement of the litigation with Luna are as follows (in thousands):



|                                 |  |   |        | 
|-------------------------------- |  | - | ------ | 
|Common stock                     |  | $ | 4,420  | 
|Warrant to purchase common stock |  |   | 583    | 
|Secured promissory note          |  |   | 5,000  | 
|                                 |  |   |        | 
|                                 |  | $ | 10,003 | 
|                                 |  |   |        | 



|7. | Commitments and Contingencies
|-- | -----------------------------

Operating Commitments

The Company rents its office
and laboratory facilities under operating leases which expire at various dates through June 2015. The Company has an option to extend the lease on its Mountain View, California facility until approximately November 30, 2019. As of
March 31, 2011, future minimum payments under the leases are as follows (in thousands):



|                           |  |                            |       | 
|-------------------------- |  | -------------------------- | ----- | 
|Periods ended
December 31, |  | FutureMinimumLeasePayments |      
|2011 (remainder of year)   |  | $                          | 1,414 | 
|2012                       |  |                            | 1,987 | 
|2013                       |  |                            | 2,092 | 
|2014                       |  |                            | 1,982 | 
|2015                       |  |                            | 76    | 
|                           |  |                            |       | 
|Total                      |  | $                          | 7,551 | 
|                           |  |                            |       | 



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##### Table of Contents

Warranties

Prior to the third quarter of 2009, the Company generally provided a limited one-year warranty on its Sensei system and
accrued the estimated cost of warranties at the time revenue was recognized. Beginning in the third quarter of 2009, the Company began providing one year of post-contract customer service on the sale of its Sensei system. Post-contract customer
service revenue is recognized ratably over the term of the service period and associated expenses are charged to cost of revenues as incurred. The Company continues to provide a limited warranty on the sale of catheters. The Companys warranty
obligation may be impacted by product failure rates, material usage and service costs associated with its warranty obligations. The Company periodically evaluates and adjusts the warranty reserve to the extent actual warranty expense differs from
the original estimates. Movement in the warranty liability was as follows (in thousands):



|                                                 |  |                              |     |   |      |   |      |  
|------------------------------------------------ |  | ---------------------------- | --- | - | ---- | - | ---- | -
|                                                 |  | Three months endedMarch 
31, |    
|                                                 |  | 2011                         |     |   | 2010 |  
|Balance at beginning of period                   |  | $                            | 15  |   |      | $ | 134  |  
|Accruals for warranties issued during the period |  |                              | 46  |   |      |   | 29   |  
|Warranty costs incurred during the period        |  |                              | (49 | ) |      |   | (113 | )
|                                                 |  |                              |     |   |      |   |      |  
|Balance at end of period                         |  | $                            | 12  |   |      | $ | 50   |  
|                                                 |  |                              |     |   |      |   |      |  

Legal Proceedings

Following the Companys October 19, 2009 announcement that it would restate certain of its financial statements,
a securities class action lawsuit was filed on October 23, 2009 in the United States District Court for the Northern District of California, naming the Company and certain of its officers. Curry v. Hansen Medical, Inc. et al., Case
No. 09-05094. The complaint asserts claims for violation of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 on behalf of a putative class of purchasers of Hansen stock between May 1, 2008 and October 18, 2009,
inclusive, and alleges, among other things, that defendants made false and/or misleading statements and/or failed to make disclosures regarding the Companys financial results and compliance with GAAP while improperly recognizing revenue; that
these misstatements and/or nondisclosures resulted in overstatement of Company revenue and financial results and/or artificially inflated the Companys stock price; and that following the Companys October 19, 2009 announcement, the
price of the Companys stock declined. On November 4, 2009 and November 13, 2009, substantively identical complaints were filed in the Northern District of California by other purported Hansen stockholders asserting the same claims on
behalf of the same putative class of Hansen stockholders. Livingstone v. Hansen Medical, Inc. et al., Case No. 09-05212 and Prenter v. Hansen Medical, Inc., et al., Case No. 09-05367. All three complaints seek certification as a class
action and unspecified compensatory damages plus interest and attorneys fees. On December 22, 2009, two purported Hansen stockholders, Mina and Nader Farr, filed a joint application for appointment as lead plaintiffs and for consolidation of
the three actions. On February 25, 2010, the Court issued an order granting Mina and Nader Farrs application for appointment as lead plaintiffs and consolidating the three securities class actions. On July 15, 2010, the Court entered
an order granting lead plaintiffs motion for leave to file a second amended complaint. Lead plaintiffs second amended complaint, in addition to alleging that shareholders suffered damages as a result of the decline in the Companys
stock price following the October 19, 2009 announcement, also alleges that shareholders suffered additional damages as the result of share price declines on July 28, 2009, July 31, 2009, January 8,
2009, July 6, 2009, and August 4, 2009, all of which lead plaintiffs allege were caused by the disclosure of what they claim was previously misrepresented information. The hearing on defendants motion to dismiss was held on
March 4, 2011. The Court took the matter under submission. The Company and the named officers intend to defend themselves vigorously against these actions.

On November 12, 2009, Dawn Cates, a purported stockholder of the Company, filed a shareholder derivative complaint
in the Superior Court of the State of California, County of Santa Clara, against the current members of the Companys board of directors and certain current and former officers of the Company (the Individual Defendants), as well as
the Companys former independent auditor, PricewaterhouseCoopers LLP (PwC). Cates v. Moll, et al., Case No 09cv157170 (the Cates Action). The Cates Action purports to be brought on behalf of the Company. The complaint
asserts claims for breach of fiduciary duties and waste of corporate assets against the Individual Defendants, and professional negligence against PwC. The complaint alleges that the Individual Defendants disseminated false and misleading
information in the Companys SEC filings, public statements and other disclosures, failed to maintain adequate internal controls and willfully ignored problems with accounting and internal control practices and procedures, mismanaged and failed
appropriately to oversee the operations of the Company, and wasted corporate assets. The complaint further alleges that the director defendants breached their fiduciary duties by allowing defendant Christopher Sells to resign from the Company. The
complaint seeks unspecified damages, internal control and corporate governance reforms, restitution and an award of costs and fees incurred in bringing the action. A substantively identical complaint (although without any claims against PwC) was
filed in Santa Clara Superior Court on November 19, 2009. Daneshmand v. Moll, et al., Case No. 09cv157592 (the Daneshmand Action). On December 22, 2009, the Santa Clara Superior Court entered an order consolidating the
Cates and Daneshmand Actions and renaming the actions as In re Hansen Medical, Inc. Shareholder Derivative Litigation, Case No. 09cv157170. Plaintiffs designated their operative complaint on August 30, 2010. Defendants filed their demurrer
to the complaint on April 18, 2011. The hearing on the demurrer is set for June 27, 2011.



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On December 15, 2009, Michael Brown, a purported stockholder of the
Company, filed a shareholder derivative complaint in the United States District Court for the Northern District of California. Brown v. Moll, et al., Case No. 09-05881 (the Brown Action). The allegations of complaint in the Brown
Action are substantively identical to the allegations of the Cates and Daneshmand Actions (the Brown Action does not name PwC as a defendant). On July 21, 2010, the Court in the Brown Action granted Defendants Motion to Dismiss on the
ground that Plaintiff had not alleged facts sufficient to establish demand futility. The Court granted Plaintiff leave to amend. Plaintiffs filed their amended complaint on August 9, 2010. On November 12, 2010, the Court granted
Defendants motion to dismiss, with prejudice. Plaintiff filed a Notice of Appeal on December 13, 2010. Plaintiff filed his opening brief in the appeal on April 6, 2011. Defendants response is due on May 30, 2011.

The Individual Defendants deny the allegations made in the Cates, Daneshmand and Brown Actions and intend to
defend themselves vigorously against those claims.

On December 1 and December 14, 2009, the Company
received letters from counsel for purported Hansen stockholders Naoum Baladi and Robert Rogowski demanding that the Companys Board of Directors take action to remedy breaches of fiduciary duty by the directors and certain officers of
Hansen and professional negligence by the Companys outside auditor PricewaterhouseCoopers, LLP. These letters recite essentially the same allegations as are contained in the Cates Action and demand that the Board take action against the
officers and directors, and PwC, to recover damages incurred by the Company and to correct deficiencies in the Companys internal controls. The letters state that if, within a reasonable time, the Board has not commenced the requested action or
if the Board refuses to commence the requested action, the named stockholders will commence derivative actions. On July 9, 2010, the Company received a letter from counsel for purported Hansen stockholder Kathy Fox demanding that the Company
investigate and bring legal action to remedy possible breaches of fiduciary duty and other potential violations of law by certain directors, officers and insiders of the Company. The Board, with the assistance of an independent counsel,
has completed its investigation regarding the allegations set forth by Baladi, Rogowski, and Fox in their letters. The Board has notified counsel for each of Baladi, Rogowski and Fox that it has determined, in the exercise of its business judgment,
that any litigation would not be in the best interests of the Company, and it affirmatively objects to the commencement of any litigation on behalf of the Company. On January 11, 2011, the Company received a letter from counsel for purported
Hansen stockholder Dawn Cates demanding the Board take action to remedy possible breaches of fiduciary duty and other potential violations of law by certain directors, officers and insiders of the Company, and PwC. On January 18,
2011 the Board responded to counsel for Cates, indicating that it has determined, in the exercise of its business judgment, that any litigation would not be in the best interests of the Company, and it affirmatively objects to the commencement
of any litigation on behalf of the Company.

On May 11, 2010, the Securities and Exchange
Commission issued an Order Directing Private Investigation and Designating Officers to Take Testimony to determine whether the Company or any other entities or persons have engaged in, or are about to engage in, any violations of the securities
laws. The Company has cooperated with the Securities and Exchange Commission on its investigation. The Company is in discussion with the staff of the Securities and Exchange Commission regarding possible resolution. Whether a negotiated resolution
of this matter can be reached, the terms of any such resolution and the potential impact of any resolution are all uncertain.



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The Company cannot estimate whether any of the above actions will result in
any significant expenses nor the amount of any such expenses. No amounts have been accrued for any of the preceding actions based on the uncertainly of the outcomes. However, depending on the outcome of these legal actions and investigations, the
Company may be required to pay material damages and fines, consent to injunctions on future conduct, or suffer other penalties, remedies or sanctions. The ultimate resolution of these matters could have a material adverse effect on the
Companys results of operations, financial position and liquidity.



|8. | Long-term Debt
|-- | --------------

In August 2008, the Company entered into a $25 million loan and security agreement with Silicon Valley Bank, consisting of a $15 million term equipment line due in installments from April 2009 through
September 2012 bearing annual interest equal to the U.S. Treasury note yield to maturity plus 3.5%, and a one-year $10 million revolving credit line, which is no longer available. The interest rate on borrowings under the equipment line becomes
fixed for each borrowing at the time of the draw-down. The Companys ability to draw down on the term equipment line ended on March 31, 2009. The interest rate on borrowings under the one-year revolving credit line adjusts with the
banks Prime Rate. The loans are collateralized by substantially all of the Companys assets, excluding intellectual property, and are subject to certain covenants which, if not met, could constitute an event of default. These covenants
include maintaining the required liquidity, achieving the specified EBITDA amounts, the non-occurrence of a material adverse change (defined as a material impairment in the perfection or priority of the banks lien in the collateral or in the
value of the collateral, a material adverse change in the business, operations or conditions (financial or otherwise) of the Company, or a material impairment of the prospect of repayment of any portion of the Companys outstanding obligations)
and fulfilling certain reporting requirements. The liquidity covenants require the Company to maintain at the end of each month either liquid assets in the amount of 1.5 times the outstanding loan balance or sufficient liquidity to fund at least six
months of projected operations, whichever is greater. The Company and Silicon Valley Bank have yet to determine the quarterly EBITDA amounts. As of March 31, 2011, the Company was in compliance with all specified financial covenants. The
Company has drawn down approximately $12.5 million against the term equipment line at an interest rate of 6.12% and, per the original agreement terms, the remainder of this line is no longer available.

Future annual payments due on the amounts outstanding as of March 31, 2011 calculated according to the existing debt
repayment schedule are as follows (in thousands):



|                                   |  |   |        |  
|---------------------------------- |  | - | ------ | -
|2011 (remainder of year)           |  | $ | 2,868  |  
|2012                               |  |   | 3,491  |  
|                                   |  |   |        |  
|                                   |  |   | 6,359  |  
|Less: Amount representing interest |  |   | (1,012 | )
|                                   |  |   |        |  
|                                   |  |   | 5,347  |  
|Less: Current portion              |  |   | 3,565  |  
|                                   |  |   |        |  
|Long-term portion                  |  | $ | 1,782  |  
|                                   |  |   |        |  



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|9. | Stockholders Equity
|-- | --------------------

Stock-based Compensation

Employee and non-employee
stock-based compensation expense for stock-based awards under the Companys 2002 Stock Option Plan, 2006 Equity Incentive Plan and 2006 Employee Stock Purchase Plan was allocated as follows (in thousands):



|                                    |  |                              |       |  |      |   |       | 
|----------------------------------- |  | ---------------------------- | ----- |  | ---- | - | ----- | 
|                                    |  | Three months endedMarch 
31, |      
|                                    |  | 2011                         |       |  | 2010 |  
|Cost of goods sold                  |  | $                            | 371   |  |      | $ | 167   | 
|Research and development            |  |                              | 597   |  |      |   | 496   | 
|Selling, general and administrative |  |                              | 1,318 |  |      |   | 631   | 
|                                    |  |                              |       |  |      |   |       | 
|Total                               |  | $                            | 2,286 |  |      | $ | 1,294 | 
|                                    |  |                              |       |  |      |   |       | 

The Company uses the Black-Scholes pricing model to determine the fair value of stock
options. The determination of the fair value of stock-based payment awards on the date of grant is affected by our stock price as well as assumptions regarding a number of complex and subjective variables. These variables include the Companys
expected stock price volatility over the term of the awards, actual and projected employee stock option exercise behaviors, risk-free interest rates and expected dividends. The estimated grant date fair values of the employee stock options for the
periods presented were calculated using the Black-Scholes valuation model, based on the following assumptions:



|                         |  |                              |  |     
|------------------------ |  | ---------------------------- |  | ----
|Employee Stock Options:  |  | Three months endedMarch 
31,
|                         |  | 2011                         |  | 2010
|Expected volatility      |  | 60%-61%                      |  | 60% 
|Risk-free interest rate  |  | 2.2%-2.3%                    |  | 2.3%
|Expected term (in years) |  | 4.50                         |  | 4.50
|Expected dividend rate   |  | 0%                           |  | 0%  

Stock-based compensation expense related to stock options granted to non-employees is recognized on an accelerated basis
as the stock options are earned. The Company believes that the fair value of the stock options is more reliably measurable than the fair value of the services received. The fair value of the stock options granted to non-employees is calculated at
each reporting date using the Black-Scholes option pricing model, using the following assumptions:



|                            |  |                              |  |          
|--------------------------- |  | ---------------------------- |  | ---------
|Non-Employee Stock Options: |  | Three months endedMarch 
31,
|                            |  | 2011                         |  | 2010     
|Expected volatility         |  | 66%                          |  | 59%-61%  
|Risk-free interest rate     |  | 1.3%                         |  | 2.1%-3.3%
|Contractual term (in years) |  | 3.00                         |  | 4.00-7.00
|Expected dividend rate      |  | 0%                           |  | 0%       

The
estimated fair values of the shares issued under the Companys Employee Stock Purchase Plan were calculated using the following assumptions:



|                              |  |                              |  |     
|----------------------------- |  | ---------------------------- |  | ----
|Employee Stock Purchase Plan: |  | Three months endedMarch 
31,
|                              |  | 2011                         |  | 2010
|Expected volatility           |  | 74%                          |  | 61% 
|Risk-free interest rate       |  | 0.2%                         |  | 0.2%
|Expected term (in years)      |  | 0.50                         |  | 0.50
|Expected dividend rate        |  | 0%                           |  | 0%  



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##### Table of Contents

Stock Option and Equity Incentive Plans

Option activity under the Companys 2002 Stock Option Plan and 2006 Equity Incentive Plan was as follows:



|                                 |  |                    |       |   |                                |   |      |                                          |  |  |                          |  |  |   |       | 
|-------------------------------- |  | ------------------ | ----- | - | ------------------------------ | - | ---- | ---------------------------------------- |  |  | ------------------------ |  |  | - | ----- | 
|                                 |  | OptionsOutstanding |       |   | Weighted-AverageExercise Price |   |      | Weighted-AverageRemainingContractualTerm |  |  | AggregateIntrinsic Value | 
|                                 |  | (In thousands)     |       |   |                                |   |      | (In years)                               |  |  | (In thousands)           | 
|Balance, January 1, 2011         |  |                    | 7,179 |   |                                | $ | 5.65 |                                          |  |  |                          |  |  |   |       | 
|Options granted                  |  |                    | 273   |   |                                | $ | 2.12 |                                          |  |  |                          |  |  |   |       | 
|Options exercised                |  |                    | (49   | ) |                                | $ | 1.27 |                                          |  |  |                          |  |  |   |       | 
|Options cancelled                |  |                    | (221  | ) |                                | $ | 6.24 |                                          |  |  |                          |  |  |   |       | 
|                                 |  |                    |       |   |                                |   |      |                                          |  |  |                          |  |  |   |       | 
|Balance, March 31, 2011          |  |                    | 7,182 |   |                                | $ | 5.53 |                                          |  |  | 5.61                     |  |  | $ | 1,111 | 
|                                 |  |                    |       |   |                                |   |      |                                          |  |  |                          |  |  |   |       | 
|Options vested at March 31, 2011 |  |                    | 2,947 |   |                                | $ | 9.33 |                                          |  |  | 4.45                     |  |  | $ | 217   | 
|                                 |  |                    |       |   |                                |   |      |                                          |  |  |                          |  |  |   |       | 

As of March 31, 2011, total unamortized stock-based compensation related to unvested
stock options was $5,247,000, with a weighted-average recognition period of 2.53 years.

Restricted stock unit
activity under the 2006 Equity Incentive Plan is as follows:



|                         |  |                                   |       |   |                                        |   |      | 
|------------------------ |  | --------------------------------- | ----- | - | -------------------------------------- | - | ---- | 
|                         |  | Restricted 
StockUnitsOutstanding |       |   | Weighted-Average FairValue
WhenAwarded |  
|                         |  | (In thousands)                    |       |   |                                        |  
|Balance, January 1, 2011 |  |                                   | 1,035 |   |                                        | $ | 1.59 | 
|Awarded                  |  |                                   | 1,510 |   |                                        | $ | 1.97 | 
|Vested                   |  |                                   | (593  | ) |                                        | $ | 1.68 | 
|Cancelled                |  |                                   | (226  | ) |                                        | $ | 1.51 | 
|                         |  |                                   |       |   |                                        |   |      | 
|Balance, March 31, 2011  |  |                                   | 1,726 |   |                                        | $ | 1.90 | 
|                         |  |                                   |       |   |                                        |   |      | 

As of March 31, 2011, 699,000 shares of common stock were available for grant
under the 2006 Equity Incentive Plan.



|10. | Income Taxes
|--- | ------------

Although the Company has net income for the quarter ended March 31, 2011, it does not expect to have net income for the full year ended December 31, 2011. As such, the Company has not recorded
an income tax provision for the quarter ended March 31, 2011.

The Company currently has uncertain tax
positions related to research and development credits. If the Company is able to eventually recognize these uncertain tax positions, all of the unrecognized benefit would reduce the Companys effective tax rate. The Company currently has a full
valuation allowance against its net deferred tax asset which would impact the timing of the effective tax rate benefit should any of these uncertain tax positions be favorably settled in the future.



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##### Table of Contents

|11. | Net Income (Loss) Per Share
|--- | ---------------------------

The following table sets forth the computation of basic and diluted net income (loss) per share (in thousands, except per share data):



|                                                                                        |  |                              |        |  |      |   |        |  
|--------------------------------------------------------------------------------------- |  | ---------------------------- | ------ |  | ---- | - | ------ | -
|                                                                                        |  | Three months ended March 31, |       
|                                                                                        |  | 2011                         |        |  | 2010 |  
|Net income (loss)                                                                       |  | $                            | 11,677 |  |      | $ | (3,846 | )
|                                                                                        |  |                              |        |  |      |   |        |  
|Basic:                                                                                  |  |                              |        |  |      |   |        |  
|Weighted-average common shares used to compute basic net income (loss) per share        |  |                              | 54,098 |  |      |   | 37,540 |  
|                                                                                        |  |                              |        |  |      |   |        |  
|Basic net income (loss) per share                                                       |  | $                            | 0.22   |  |      | $ | (0.10  | )
|                                                                                        |  |                              |        |  |      |   |        |  
|Diluted:                                                                                |  |                              |        |  |      |   |        |  
|Weighted-average common shares used to compute basic net income (loss) per share        |  |                              | 54,098 |  |      |   | 37,540 |  
|Dilutive effect of outstanding stock options                                            |  |                              | 256    |  |      |   |       |  
|Dilutive effect of unvested restricted stock units                                      |  |                              | 1,041  |  |      |   |       |  
|Dilutive effect of estimated shares to be issued under the employee stock purchase plan |  |                              | 57     |  |      |   |       |  
|                                                                                        |  |                              |        |  |      |   |        |  
|Weighted-average common shares used to compute diluted net income (loss) per share      |  |                              | 55,452 |  |      |   | 37,540 |  
|                                                                                        |  |                              |        |  |      |   |        |  
|Diluted net income (loss) per share                                                     |  | $                            | 0.21   |  |      | $ | (0.10  | )
|                                                                                        |  |                              |        |  |      |   |        |  

The following table sets forth potential shares of common stock that are not included in the
calculation of diluted net income (loss) per share because to do so would be anti-dilutive as of the end of each period presented (in thousands):



|                                           |  |           |       |  |      |  |       | 
|------------------------------------------ |  | --------- | ----- |  | ---- |  | ----- | 
|                                           |  | March 31, |      
|                                           |  | 2011      |       |  | 2010 | 
|Stock options outstanding                  |  |           | 6,037 |  |      |  | 3,958 | 
|Unvested restricted stock units            |  |           |      |  |      |  | 10    | 
|Proceeds from employee stock purchase plan |  |           |      |  |      |  | 101   | 



|12. | Comprehensive Income (Loss)
|--- | ---------------------------

Total comprehensive income (loss) was as follows (in thousands):



|                                                     |  |                              |        |  |      |   |        |  
|---------------------------------------------------- |  | ---------------------------- | ------ |  | ---- | - | ------ | -
|                                                     |  | Three months ended March 31, |       
|                                                     |  | 2011                         |        |  | 2010 |  
|Net income (loss)                                    |  | $                            | 11,677 |  |      | $ | (3,846 | )
|Other comprehensive income (loss):                   |  |                              |        |  |      |   |        |  
|Change in unrealized gains and losses on investments |  |                              | 1,093  |  |      |   | (2,058 | )
|Foreign currency translation adjustment              |  |                              | 25     |  |      |   | (21    | )
|                                                     |  |                              |        |  |      |   |        |  
|Comprehensive income (loss)                          |  | $                            | 12,795 |  |      | $ | (5,925 | )
|                                                     |  |                              |        |  |      |   |        |  



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ITEM 2. MANAGEMENTS DISCUSSION AND ANALYSIS OF
FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The following discussion should be read in conjunction
with the condensed consolidated financial statements and notes thereto appearing elsewhere in this Quarterly Report on Form 10-Q.

Except for the historical information contained herein, the matters discussed in this Managements Discussion and Analysis of Financial Condition and Results of Operations, are
forward-looking statements that involve risks and uncertainties. In some cases, these statements may be identified by terminology such as may, will, should, expects, could,
intends, might, plans, anticipates, believes, estimates, predicts, potential, or continue, or the negative of such terms and other comparable
terminology. These statements involve known and unknown risks and uncertainties that may cause our results, levels of activity, performance or achievements to be materially different from those expressed or implied by the forward-looking statements.
Factors that may cause or contribute to such differences include, among others, those discussed in this report in Part II, Item 1A Risk Factors. Except as may be required by law, we undertake no obligation to update any
forward-looking statement to reflect events after the date of this report.

Overview

The following discussion of our financial condition and results of operations should be read in conjunction with our
condensed consolidated financial statements and the related notes thereto included elsewhere in this quarterly report on Form 10-Q.

We develop, manufacture and sell a new generation of medical robotics designed for accurate positioning, manipulation and stable control of catheters and catheter-based technologies. Our Sensei
Robotic Catheter System, or Sensei system, is designed to allow physicians to instinctively navigate flexible catheters with greater stability and control in interventional procedures. We believe our Sensei system and its corresponding disposable
catheters will enable physicians to perform procedures that historically have been too difficult or time consuming to accomplish routinely with manually-controlled, hand-held catheters and catheter-based technologies, or that we believe could be
accomplished only by the most skilled physicians. We believe that our Sensei system has the potential to benefit patients, physicians, hospitals and third-party payors by improving clinical outcomes and permitting more complex procedures to be
performed interventionally.

We were formerly known as Autocath, Inc. and were incorporated in Delaware on
September 23, 2002. In March 2007, we established Hansen Medical UK Ltd, a wholly-owned subsidiary located in the United Kingdom and, in May 2007, we established Hansen Medical Deutschland, GmbH, a wholly-owned subsidiary located in Germany.
Since inception, we have devoted the majority of our resources to the development and commercialization of our Sensei system. Prior to the second quarter of 2007, we were a development stage company with a limited operating history. In the second
quarter of 2007 we obtained the necessary regulatory approvals and recorded our initial product revenues. To date, we have incurred net losses in each year since our inception and, as of March 31, 2011, we had an accumulated deficit of $246.4
million. Although we had net income in the first quarter of 2011, this was due to the one-time sale of intellectual property and we expect our quarterly losses to continue through at least 2011 as we continue to expand the commercialization of our
Sensei system and our catheters and continue to develop new products. We have financed our operations primarily through the sale of public and private equity securities and the issuance of debt and the licensing of intellectual property.

We received CE Mark approval for our Sensei system in the fourth quarter of 2006 and made our first commercial shipments
to the European Union in the first quarter of 2007. We deferred all revenue associated with those shipped systems as we had not yet received CE Mark approval for our Artisan catheters. In May 2007, we received CE Mark approval for our Artisan
catheter and also received FDA clearance for the marketing of our Sensei system and Artisan catheter for manipulation, positioning and control of certain mapping catheters during electrophysiology procedures. As a result, we recorded our first
revenues in the second quarter of 2007. We received CE Mark for our Lynx Catheter in September 2010.



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We market our products in the United States primarily through a direct sales
force of regional sales employees, supported by clinical account managers who provide training, clinical support and other services to our customers. Outside the United States, primarily in the European Union, we use a combination of a direct sales
force and distributors to market, sell and support our products. We have increased our manufacturing capacity to enable production of commercial quantities of our Sensei system and our catheters.

In April 2007, we entered into development and marketing agreements with St. Jude Medical, Inc., or
St. Jude. Pursuant to these agreements, we have introduced our CoHesionTM 3D Visualization Module, or CoHesion Module, which integrates our Sensei system with St. Judes Ensite® system. Under the agreements, we are solely responsible for obtaining regulatory approvals for, and all costs associated with, our portion of the integrated products
developed under the arrangement. In addition, under the terms of the co-marketing agreement, we granted St. Jude the exclusive right to distribute products developed under the joint development agreement when ordered with St. Jude products
worldwide, excluding certain specified countries, for the diagnosis and/or treatment of electrophysiologic cardiac conditions.

In November 2007, we acquired AorTx, Inc., or AorTx, an early stage company developing heart valves to be delivered in minimally invasive surgery by catheters through the skin and blood vessels. We have
eliminated the research and development positions focused on developing the AorTx valve technology and in 2009, we entered into an agreement to license the acquired AorTx technologies back to an entity formed by the former AorTx stockholders.

In November 2009, we entered into agreements with Royal Philips Electronics, or Philips, to co-develop
integrated products that we hope will simplify complex cardiac procedures to diagnose and treat arrhythmias. The agreements are intended to lead to the creation of integrated product solutions by combining Philips Allura Xper X-Ray system with
our Sensei system. The resulting innovations will seek to enable electrophysiologists to perform complex procedures with greater confidence and improved efficiency. We believe that closer integration between robotics and imaging systems will afford
greater clinical capability in endovascular procedures.

Additionally, in December 2009, we entered into an
extended joint development agreement with Philips. Under the terms of the extended joint development agreement, we will, with support and collaboration from Philips, develop a vascular robotics platform and associated catheters, or Vascular
System. The Vascular System will not include our Sensei Robotic Catheter System or any system used for endoluminal, cardiac or other non-vascular procedures. Pursuant to the Agreement, Philips will partially fund our development costs based
upon our achievement of development milestones for the Vascular System. We will pay Philips royalties based on the number of Vascular Systems and associated catheters that are sold, subject to caps based on the amounts Philips contributes to the
development. The extended joint development agreement will remain in effect until the earlier of April 1, 2012 or the completion of the Vascular System, provided that either party may terminate the Agreement in the event of the other
partys uncured failure to perform a material obligation. Philips may also terminate the Agreement for convenience upon 60 days prior written notice and the payment of a variable termination fee. In February 2011, we amended the extended joint
development agreement. The amendment of the extended joint development agreement increased the amount of funding provided by Philips for the development of the Vascular System and could potentially extend and increase certain royalty fees to be paid
to Philips based on sales of the Vascular System subject to caps based on the amounts Philips contributes to the development of the system. Funding received from Philips under this agreement including $5.0 million received to date from the original
agreement and $6.0 million associated with the amendment in February 2011 is recognized as a reduction to research and development costs ratably as milestones are met through the end of the term of the agreement, which is estimated to be September
2011.

In February 2011, we entered, directly and through a wholly-owned subsidiary, into patent and
technology license, sublicense and purchase agreements with Philips to allow them to develop and commercialize the non-robotic applications of our Fiber Optic Shape Sensing and Localization (FOSSL) technology. Under the terms of the agreements,
Philips has the exclusive right to develop and commercialize the FOSSL technology in the non-robotic vascular, endoluminal and orthopedic fields. Philips also receives non-exclusive rights in other non-robotic medical device fields, but not to any
multi-degree of freedom robotic applications. If Philips does not meet certain specified commercialization obligations, we have the rights to re-acquire the licenses granted to Philips for pre-determined payments. The agreement also contains
customary representations, warranties and indemnification provisions by each party. Each party may terminate the agreements for material breach by the other party. In connection with the agreements, we received upfront payments of $23.0 million and
will be eligible to receive up to an additional $78.0 million in future payments associated with the successful commercialization by Philips or its collaborators of products containing FOSSL technology.



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Critical Accounting Policies, Estimates and Judgments

We prepare our consolidated financial statements in accordance with accounting principles generally accepted in the United
States. In doing so, we have to make estimates and assumptions that affect our reported amounts of assets, liabilities, revenues and expenses, as well as related disclosures of contingent assets and liabilities. In many cases, we could reasonably
have used different accounting policies and estimates. In some cases, changes in the accounting estimates are reasonably likely to occur from period to period. Accordingly, actual results could differ materially from our estimates. We base our
estimates on our past experience and on other assumptions that we believe are reasonable under the circumstances, and we evaluate these estimates on an ongoing basis. To the extent that there are material differences between these estimates and
actual results, our financial condition or results of operations will be affected. Our significant accounting policies are fully described in Note 2 to our Financial Statements included in our Annual Report on Form 10-K for the year ended
December 31, 2010 filed with the U.S. Securities and Exchange Commission. There have been no significant changes to those policies in the three months ended March 31, 2011 with the exception of the following.

Revenue Recognition

Our revenues are primarily derived from the sale of the Sensei system and the associated catheters as well as the sale of
post-contract customer service. Prior to January 1, 2011, as computer software was more than incidental to the functioning of those products, our revenue recognition policy was based on authoritative guidance regarding software revenue
recognition. However, in October 2009, the Financial Accounting Standards Board issued authoritative guidance related to certain revenue arrangements that include software elements and revenue arrangements with multiple deliverables. This guidance
became effective for us beginning January 1, 2011 and changes the way that we account for certain revenue arrangements that include multiple deliverables. In general, the new guidance allows certain elements to be recognized as revenue earlier
than under the previous guidance. We are adopting the revised guidance through prospective application, wherein all revenue arrangements entered into or materially modified after January 1, 2011 are accounted for under the revised guidance and
any revenue arrangements which were entered into prior to January 1, 2011 and for which there is still unrecognized revenue will continue to be accounted for under the previous guidance. Had we recognized revenue in the first quarter of 2011
consistent with the guidance used to recognize revenues in periods previous to January 1, 2011, product revenue for the first quarter of 2011 would have been $3,505,000.

We recognize revenue when persuasive evidence of an arrangement exists, delivery to the customer has occurred or the
services have been fully rendered, the sales price is fixed or determinable and collectability is probable.



| |  |  | Persuasive Evidence of an Arrangement.  Persuasive evidence of an arrangement for sales of Sensei systems is generally determined
by a sales contract signed and dated by both us and the customer, including approved terms and conditions and the receipt of an approved purchase order. Evidence of an arrangement for the sale of disposable products is determined through an approved
purchase order from the customer. Evidence of an arrangement for the sale of post-contract customer service is determined through either a signed sales contract or an approved purchase order from the customer.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



21



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##### Table of Contents

| |  |  | Delivery.
| | - |  | ---------



| |  |  | Multiple-element Arrangements.  Typically, all products and services sold to customers are itemized and priced separately. In
arrangements that include multiple elements, we allocate revenue to the various elements based on vendor-specific objective evidence of fair value, or VSOE, of the elements if VSOE exists. VSOE for each element is based on the price for which the
item is sold separately, determined based on historical evidence of stand-alone sales of these elements or stated renewal rates for the element. If VSOE does not exist for an element, we allocate revenue based on third-party evidence, or TPE, of
selling price for the elements if TPE exists. TPE is the price of our or any competitors largely interchangeable products or services in standalone sales to similarly situated customers. If neither VSOE nor TPE exist for a specific element, we
allocate revenue to the various elements based on our best estimate of the selling price for that element or estimated selling price, or ESP, using a top-down approach, which takes into account our target prices and overall pricing objectives. In
situations where we have delivered certain elements but not delivered other elements, after we have allocated revenue to the various elements under the relative selling price method based on VSOE, TPE or ESP, we defer revenue for the undelivered
elements. Prior to January 1, 2011, we allocated revenue to the various elements based solely on VSOE of the elements. When contracts contained multiple elements wherein VSOE existed for all undelivered elements, the residual method prescribed
by authoritative guidance regarding software revenue recognition was used to account for the delivered elements. Under the residual method, the full VSOE of the undelivered element was deferred until that element was delivered and any residual
revenue was then recognized. When we could not reasonably determine the VSOE of an undelivered element, the entire arrangement fee was deferred until all elements were delivered. If we could not establish VSOE for an element of the arrangement and
the only undelivered element was post-contract customer support, or PCS, the arrangement fee was recognized ratably over the term of the PCS. If we could not establish VSOE except for PCS, revenue was recognized under the residual method when the
only remaining undelivered element was PCS. For all periods presented through December 31, 2010, we did not have VSOE for training and installation services, but did have VSOE for PCS and recognized revenue once the only undelivered element was
PCS.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Systems.  Typically, ownership of the Sensei system passes to customers upon shipment, at which time delivery is deemed to be
complete. Substantially all of the sales contracts for systems include installation and training. Prior to January 1, 2011, as these services were not deemed to be perfunctory and we had not established VSOE for these elements, all such system
revenue was deferred until training and installation were completed.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Disposable Products.  Ownership of the catheters and other disposable products typically passes to customers upon shipment, at
which time delivery is deemed to be complete.
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Post-contract Customer Service Revenue.  We recognize post-contract customer service revenue from the sale of product maintenance
plans. Revenue from post-contract customer services, whether sold individually or as a separate unit of accounting in a multi-element arrangement, is deferred and amortized over the service period, which is typically one year.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | Sales Price Fixed or Determinable.    The Company assesses whether the sales price is fixed or determinable at the time
of the transaction. Sales prices are documented in the executed sales contract or purchase order received prior to shipment. If a significant portion of the sales price is considered to have extended payment terms, the sales price is accounted for
as not being fixed or determinable and revenue is recognized as payments become due. The Companys standard terms do not allow for contingencies, such as trial or evaluation periods, refundable orders, payments contingent upon the customer
obtaining financing or other contingencies which would impact the customers obligation. In situations where contingencies such as those identified are included, all related revenue is deferred until the contingency is resolved.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



22



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##### Table of Contents

| |  |  | Collectability.    We assess whether collection is probable based on a number of factors, including the customers
past transaction history and credit worthiness. If collection of the sales price is not deemed probable, the revenue is deferred and recognized at the time collection becomes probable, which is usually upon receipt of cash. Our sales contracts
generally do not allow the customer the right of cancellation, refund or return, except as provided under our standard warranty. If such rights were allowed, all related revenues would be deferred until such rights expired.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Significant management judgments and estimates are made in connection with the
determination of revenue to be recognized and the period in which it is recognized. If different judgments and estimates were utilized, the amount of revenue to be recognized and the period in which it is recognized could differ materially from the
amounts reported.

Financial Overview

Revenues

We made our first commercial shipments to Europe in the first quarter of 2007 and recognized our first revenues in the second quarter of 2007 for both European and U.S. customers. 2008 represented our
first full year of revenues. Our revenues consist of sales of Sensei systems, catheters, other disposables and, beginning in 2008, post-contract customer service. We have experienced significant fluctuations in quarterly revenues, primarily
attributable to still being in the early stages of our commercial launch and, especially beginning in the fourth quarter of 2008 and continuing through the first quarter of 2011, difficult general economic and capital market conditions, slower than
expected macro-economic recovery and uncertainty created by new health care reform legislation that has impacted capital purchases by healthcare providers. We expect these fluctuations to continue throughout 2011. We do not anticipate that revenues
in 2011 will be sufficient to eliminate losses.

Cost of Revenues

Cost of revenues consists primarily of materials, direct labor, depreciation, overhead costs associated with
manufacturing, training and installation costs, royalties, provisions for inventory valuation, warranty expenses and the cost associated with our post-contract customer service. We expect that cost of revenues, both as a percentage of revenues and
on a dollar basis, will continue to vary from quarter to quarter in 2011 due, among other things, to fluctuations in shipments and revenue levels, average selling prices, the mix of products sold including the potential introduction of our Vascular
System, manufacturing levels and manufacturing yields.

Research and Development Expenses

Our research and development expenses primarily consist of engineering, software development, product
development, quality assurance and clinical and regulatory expenses, including costs to develop our Sensei system and disposable catheters. Research and development expenses include employee compensation, including stock-based compensation expense,
consulting services, outside services, materials, supplies, depreciation and travel. We expense research and development costs as they are incurred. Prior to our first commercial shipments in the second quarter of 2007, research and development
expenses also included manufacturing costs for commercial products, including start-up manufacturing costs. We expect research and development expenses in 2011 before reductions for the funding recognized under our extended joint development
agreement with Philips to remain approximately consistent with 2010 levels (also before reductions for funding from Philips) due to the development of a vascular platform, our on-going development activities for the electrophysiology market and
exploring certain other potential future applications of our technology.

Selling, General and
Administrative Expenses

Our selling, general and administrative expenses consist primarily of
compensation for executive, finance, sales, legal and administrative personnel, including sales commissions and stock-based compensation. Other significant expenses include costs associated with attending medical conferences, professional fees for
legal services (including legal services associated with our efforts to obtain and maintain broad protection for the intellectual property related to our products) and accounting services, consulting fees and travel expenses. We expect our selling,
general and administrative expenses in 2011 to remain approximately consistent with 2010 levels as we continue our active management of general and administrative employee costs while we continue to maintain our sales and clinical support groups
necessary for the continued commercialization of our electrophysiology products and the expected introduction of our Vascular System.



23



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##### Table of Contents

Gain on Settlement of Litigation

Gain on settlement of litigation consists of the value of common stock, a common stock warrant and a note receivable
received in connection with the settlement of our litigation with Luna Innovations, Inc, or Luna.

Gain
on Sale of Intellectual Property

Gain on sale of intellectual property consists of amounts received in
exchange for patent and technology license, sublicense and purchase agreements with Philips to allow them to develop and commercialize the non-robotic applications of our Fiber Optic Shape Sensing and Localization (FOSSL) technology in the
non-robotic vascular, endoluminal and orthopedic fields.

Results of Operations

Comparison of the quarter ended March 31, 2011 to the quarter ended March 31, 2010

Revenues



|               |  |                             |       |  |        |   |       |   |  |   |       |  |  |     
|-------------- |  | --------------------------- | ----- |  | ------ | - | ----- | - |  | - | ----- |  |  | ----
|               |  | Three Months EndedMarch 31, |       |  | Change
|               |  | 2011                        |       |  | 2010   |   |       | $ |  |   | %    
|               |  | (Dollars in thousands)     
|Product        |  | $                           | 3,903 |  |        | $ | 1,613 |   |  | $ | 2,290 |  |  | 142%
|Service        |  |                             | 1,376 |  |        |   | 1,098 |   |  |   | 278   |  |  | 25% 
|               |  |                             |       |  |        |   |       |   |  |   |       |  |  |     
|Total revenues |  | $                           | 5,279 |  |        | $ | 2,711 |   |  | $ | 2,568 |  |  | 95% 

Revenues primarily related to the following:



|                                                   |  |                             |     |  |      |   |     | 
|-------------------------------------------------- |  | --------------------------- | --- |  | ---- | - | --- | 
|                                                   |  | Three Months EndedMarch 31, |    
|                                                   |  | 2011                        |     |  | 2010 |  
|United States Sensei system units                  |  |                             | 3   |  |      |   | 0   | 
|International Sensei system units                  |  |                             | 2   |  |      |   | 1   | 
|                                                   |  |                             |     |  |      |   |     | 
|Total Sensei system units                          |  |                             | 5   |  |      |   | 1   | 
|                                                   |  |                             |     |  |      |   |     | 
|Sensei system average selling price (in thousands) |  | $                           | 519 |  |      | $ | 342 | 
|                                                   |  |                             |     |  |      |   |     | 
|Catheter units                                     |  |                             | 693 |  |      |   | 637 | 
|                                                   |  |                             |     |  |      |   |     | 
|Catheter average selling price (in thousands)      |  | $                           | 1.7 |  |      | $ | 1.7 | 
|                                                   |  |                             |     |  |      |   |     | 

System units sold in the first quarter of 2011 benefited by the sale of one international
system which we would not have been able to recognize under the authoritative accounting guidance in effect prior to January 1, 2011. Our average selling prices of Sensei systems in the first quarter of 2011 as compared to 2010 were positively
impacted by the fact that the one system recognized in the first quarter of 2010 was to an international distributor, which tend to generate lower average selling prices. Average selling prices in the first quarter of 2011 further benefited from the
sale of our Sensei X model, which has a higher list price than our original Sensei model. Sales of catheters increased in the first quarter of 2011 as compared to 2010 due principally to our increased installed base. Service revenue increased in the
first quarter of 2011 as compared to 2010 due primarily to our increased installed base. We have experienced significant fluctuations in quarterly revenues, primarily due to the fact that we are still in the early stages of our commercial launch
and, especially beginning in the fourth quarter of 2008 and continuing through the first quarter of 2011, difficult general economic and capital market conditions, slower than expected macro-economic recovery and uncertainty created by new
healthcare reform legislation that has impacted capital purchases by health care providers. As discussed in our risk factors, these conditions can cause potential customers to delay purchases and can lengthen sales cycles and these factors have
contributed to the variability of our results. We expect revenue fluctuations to continue throughout 2011.



24



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##### Table of Contents

Cost of Revenues



|                            |  |                             |       |  |        |   |        |   |  |   |     |   |  |  |      | 
|--------------------------- |  | --------------------------- | ----- |  | ------ | - | ------ | - |  | - | --- | - |  |  | ---- | 
|                            |  | Three Months EndedMarch 31, |       |  | Change |  
|                            |  | 2011                        |       |  | 2010   |   |        | $ |  |   | %   |  
|                            |  | (Dollars in thousands)      |      
|Product                     |  | $                           | 3,769 |  |        | $ | 2,855  |   |  | $ | 914 |   |  |  | 32%  | 
|Service                     |  |                             | 693   |  |        |   | 715    |   |  |   | (22 | ) |  |  | (3)% | 
|                            |  |                             |       |  |        |   |        |   |  |   |     |   |  |  |      | 
|Total cost of revenues      |  | $                           | 4,462 |  |        | $ | 3,570  |   |  | $ | 892 |   |  |  | 25%  | 
|As a percentage of revenues |  |                             | 84.5% |  |        |   | 131.7% |   |  |   |     |   |  |  |      | 

Cost of revenues for the first quarter of 2011 included stock-based compensation
expense of $371,000 as compared to $167,000 in the first quarter of 2010. Cost of revenues as a percentage of revenues for the first quarter of 2011 were positively impacted by the increased level of sales. We expect that cost of revenues both as a
percentage of revenues and on a dollar basis will continue to vary significantly through 2011 due, among other things, to fluctuations in shipments and revenue levels, the timing of revenue recognition on shipped systems, average selling prices, the
mix of products sold including the potential introduction of our Vascular System, manufacturing levels and manufacturing yields.

Operating Expenses

Research and Development



|                         |  |                             |       |  |        |   |       |   |  |   |      |   |  |      
|------------------------ |  | --------------------------- | ----- |  | ------ | - | ----- | - |  | - | ---- | - |  | -----
|                         |  | Three Months EndedMarch 31, |       |  | Change
|                         |  | 2011                        |       |  | 2010   |   |       | $ |  |   | %   
|                         |  | (Dollars in thousands)     
|Research and development |  | $                           | 4,185 |  |        | $ | 4,767 |   |  | $ | (582 | ) |  | (12)%

The
change in research and development expenses in the first quarter of 2011 compared to the first quarter of 2010 was primarily due to the following:



| |  |  | A decrease of $1.8 million due to an increase in the recognition of funded development costs under the Philips agreement in the first quarter of
2011 as compared to the first quarter of 2010;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | An increase of $0.1 million in stock-based compensation expense due primarily to the increased issuance of restricted stock units in the first
quarter of 2011 as compared to the first quarter of 2010;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | An increase of $0.3 million in employee-related expenses, including travel expenses, primarily due to an increase of three in average research and
development headcount; and
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | An increase of $0.8 million in outside services, materials and overhead expenses, exclusive of Philips reimbursements, related primarily to costs
associated with the development of vascular applications of our technology.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Total research
and development expenses in the first quarter of 2011 included $0.6 million of stock-based compensation expense compared to $0.5 million in the first quarter of 2010. We expect research and development expenses in 2011 before reductions for the
funding recognized under our extended joint development agreement with Philips to remain approximately consistent with 2010 levels (also before reductions for funding from Philips) due to the development of a Vascular System, our on-going
development activities for the electrophysiology market and exploring certain other potential future applications of our technology.



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##### Table of Contents

Selling, General and Administrative



|                                    |  |                             |       |  |        |   |       |   |  |   |     |  |  |  |    | 
|----------------------------------- |  | --------------------------- | ----- |  | ------ | - | ----- | - |  | - | --- |  |  |  | -- | 
|                                    |  | Three Months EndedMarch 31, |       |  | Change |  
|                                    |  | 2011                        |       |  | 2010   |   |       | $ |  |   | %   | 
|                                    |  | (Dollars in thousands)      |      
|Selling, general and administrative |  | $                           | 8,044 |  |        | $ | 7,731 |   |  | $ | 313 |  |  |  | 4% | 

The
change in selling, general and administrative expenses in the first quarter of 2011 compared to the first quarter of 2010 was primarily due to the following:



| |  |  | An increase of $0.7 million in stock-based compensation expense, due primarily to the increased issuance of restricted stock units in the first
quarter of 2011 as compared to the first quarter of 2010;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | An increase of $0.1 million in non-compensation marketing expenses related to marketing efforts related to our current and proposed product
offerings;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | A decrease of $0.1 million in legal costs associated with our litigation with Luna in the first quarter of 2010;
| | - |  | ----------------------------------------------------------------------------------------------------------------



| |  |  | A decrease of $0.4 million in professional service fees exclusive of Luna litigation costs, primarily due to certain fees in 2010 related to our
securities class action lawsuits, derivative lawsuits and related inquiries from governmental agencies that were not covered by insurance.
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Selling, general and administrative expenses in the first quarter of 2011 included $1.3 million of stock-based compensation expense compared to $0.6 million in the first quarter of 2010. We expect our
selling, general and administrative expenses in 2011 to remain approximately consistent with 2010 levels as we continue our active management of general and administrative employee costs while we continue to maintain our sales and clinical support
groups necessary for the continued commercialization of our electrophysiology products and the expected introduction of our Vascular System.

Gain on Settlement of Litigation



|                                 |  |                             |   |  |        |   |         |   |  |   |        |  |  |  |        | 
|-------------------------------- |  | --------------------------- | - |  | ------ | - | ------- | - |  | - | ------ |  |  |  | ------ | 
|                                 |  | Three Months EndedMarch 31, |   |  | Change |  
|(Dollars in thousands)           |  | 2011                        |   |  | 2010   |   |         | $ |  |   | %      | 
|Gain on settlement of litigation |  | $                           |  |  |        | $ | (10,003 | ) |  | $ | 10,003 |  |  |  | (100)% | 

Gain
on settlement of litigation consists of the value of common stock, a warrant to purchase common stock and a secured promissory note received in connection with the settlement of our litigation with Luna in January 2010. The items were valued as
follows (in thousands):



|                                 |  |   |        | 
|-------------------------------- |  | - | ------ | 
|Common stock                     |  | $ | 4,420  | 
|Warrant to purchase common stock |  |   | 583    | 
|Secured promissory note          |  |   | 5,000  | 
|                                 |  |   |        | 
|                                 |  | $ | 10,003 | 
|                                 |  |   |        | 

Common Stock

Upon execution of these agreements, Luna issued us approximately 1.2 million shares of common stock. These shares
were not registered with the Securities and Exchange Commission but were expected to become salable six months after the date of issuance of the shares. We are in the process of removing the restriction from these shares. The fair value of the
shares recorded reflects the value that market participants would demand due to the value of the shares and the risk relating to the inability to access a public market for these securities for the specified period. The fair value of the
unregistered shares was determined as of the market closing price on the dates the shares were issued less a 20% non-marketability discount, for a total value of $4.4 million.



26



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##### Table of Contents

We concluded that 20% was an appropriate discount based primarily on an
analysis utilizing the Black-Scholes model to value a hypothetical put option to approximate the cost of hedging the restricted stock over the expected period of non-marketability. This approach calculated the amount required to buy the right to
sell the presently restricted stock at the then-current market price on the date the holder can count on the shares becoming salable on the public exchange. The assumptions input into the Black-Scholes option pricing model were based on the stock
price on the date of the share issuance, an expected term of eight months, expected volatility of 59%, risk-free interest rate of 0.14% and no expected dividends.

This conclusion was corroborated by the Black-Scholes model by assessing that the discount was generally consistent with
the ranges noted from published restricted stock studies and comparable to discounts on restricted stock transactions completed by other companies operating in similar industries as Luna.

Warrant to Purchase Common Stock

The warrant to purchase shares of common stock was valued based on an estimate of the number of shares which will be
issued over the three-year life of the warrant. The number of shares were valued utilizing the Black-Scholes option pricing model based on the stock price on the date of the agreements, expected terms ranging from three months to three years,
expected volatility ranging from 53% to 75%, risk-free interest rates ranging from 0.05% to 1.5% and no expected dividends. The total estimated fair value of the warrant was calculated at $583,000 at the date of issuance.

Secured Promissory Note

Luna issued us a secured promissory note in the principal amount of $5,000,000, with principal and interest payments to be
made in 16 equal quarterly installments commencing April 2010. The outstanding principal amount under the note accrues interest at 8.5 percent per annum, payable quarterly in arrears. Luna may prepay, in whole or in part, the outstanding amount of
the note without premium or penalty. Additionally, in connection with a Development and Supply Agreement between the parties, certain amounts billed for work performed by Luna in excess of quarterly limits are to be settled through a corresponding
reduction in the principal of the $5,000,000 note. Through March 31, 2011, Luna has made all its scheduled payments and the principal of the note had been reduced by approximately $358,000 in accordance with the Development and Supply
Agreement.

Gain on Sale of Intellectual Property



|                                      |  |                              |        |  |        |   |   |   |  |   |        |  |  |  |     | 
|------------------------------------- |  | ---------------------------- | ------ |  | ------ | - | - | - |  | - | ------ |  |  |  | --- | 
|                                      |  | Three Months Ended March 31, |        |  | Change |  
|(Dollars in thousands)                |  | 2011                         |        |  | 2010   |   |   | $ |  |   | %      | 
|Gain on sale of intellectual property |  | $                            | 23,000 |  |        | $ |  |   |  | $ | 23,000 |  |  |  | N/A | 

In
February 2011, we entered, directly and through a wholly-owned subsidiary, into patent and technology license, sublicense and purchase agreements with Philips to allow them to develop and commercialize the non-robotic applications of our Fiber Optic
Shape Sensing and Localization (FOSSL) technology. Under the terms of the agreements, Philips has the exclusive right to develop and commercialize the FOSSL technology in the non-robotic vascular, endoluminal and orthopedic fields. Philips also
receives non-exclusive rights in other non-robotic medical device fields, but not to any multi-degree of freedom robotic applications. If Philips does not meet certain specified commercialization obligations, we have the rights to re-acquire the
licenses granted to Philips for pre-determined payments. The agreement also contains customary representations, warranties and indemnification provisions by each party. Each party may terminate the agreements for material breach by the other party.
In connection with the licensing of the technology, we received an upfront nonrefundable payment of $23.0 million which was recognized immediately in operating income. We will be eligible to receive up to an additional $78.0 million in future
payments associated with the successful commercialization by Philips or its collaborators of products containing FOSSL technology.



27



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##### Table of Contents

Interest Income



|                |  |                              |    |  |        |   |     |   |  |   |     |   |  |  |       | 
|--------------- |  | ---------------------------- | -- |  | ------ | - | --- | - |  | - | --- | - |  |  | ----- | 
|                |  | Three Months 
EndedMarch 31, |    |  | Change |  
|                |  | 2011                         |    |  | 2010   |   |     | $ |  |   | %   |  
|                |  | (Dollars in thousands)       |   
|Interest income |  | $                            | 92 |  |        | $ | 128 |   |  | $ | (36 | ) |  |  | (28)% | 

Interest income from cash, cash equivalents and investments and from our note receivable from Luna decreased in the first
quarter of 2011 compared to the first quarter of 2010 primarily due to the timing of the receipt of the funds related to the Philips transaction. We expect interest income for the remainder of 2011 to remain relatively consistent with 2010 levels.

Interest and Other Expense, net



|                                |  |                             |    |   |        |   |      |   |  |   |     |  |  |  |      | 
|------------------------------- |  | --------------------------- | -- | - | ------ | - | ---- | - |  | - | --- |  |  |  | ---- | 
|                                |  | Three Months EndedMarch 31, |    |   | Change |  
|                                |  | 2011                        |    |   | 2010   |   |      | $ |  |   | %   | 
|                                |  | (Dollars in thousands)      |   
|Interest and other expense, net |  | $                           | (3 | ) |        | $ | (620 | ) |  | $ | 617 |  |  |  | 100% | 

Interest and expense, net decreased in the first quarter of 2011 as compared to the first quarter of 2010 primarily due
to a decrease in unrealized losses on the valuation of the Luna Warrants, decreases in realized and unrealized foreign exchange losses and a reduction in interest expense related to the decrease in the outstanding balance of our term equipment line.
We expect interest expense to continue to decrease in 2011 over 2010 levels as we pay down the balance of our term equipment line.

Liquidity and Capital Resources

We have incurred
significant losses since our inception in September 2002 and, as of March 31, 2011 we had an accumulated deficit of $246.4 million. We have financed our operations to date principally through the sale of capital stock, debt financing, interest
earned on investments, the sale of our products, partnering and, in the first quarter of 2011, through the sale of intellectual property. Prior to our initial public offering of stock in November 2006, we had received net proceeds of $61.3 million
from the issuance of common and preferred stock and $7.0 million in debt financing. Through our initial public offering in 2006 we received net proceeds of $78.3 million. In April 2008, we sold 3,000,000 shares of our common stock, resulting in
approximately $39.5 million of net proceeds. In April 2009, we sold 11,692,000 shares of our common stock, resulting in approximately $35.3 million of net proceeds. In April 2010, we sold 16,100,000 shares of our common stock, resulting in
approximately $29.8 million of net proceeds.

On August 25, 2008, we entered into a $25 million loan and
security agreement with Silicon Valley Bank, consisting of a $15 million term equipment line and a one-year $10 million revolving credit line. As of March 31, 2011, we had drawn down approximately $12.5 million against the equipment line under
this agreement of which $5.3 million was outstanding at March 31, 2011, and, per the original agreement terms, the remainder of this line is no longer available to us. The $10 million available under the revolving credit line expired in August
2009. Our current debt with Silicon Valley bank is collateralized by substantially all of our assets, excluding intellectual property, and is subject to certain covenants, including maintaining the required liquidity, achieving specified EBITDA
amounts and fulfilling certain reporting requirements. The liquidity covenants require us to maintain at the end of each month either liquid assets in the amount of 1.5 times the outstanding loan balance or sufficient liquidity to fund at least six
months of projected operations, whichever is greater. Silicon Valley Bank has yet to determine the quarterly EBITDA amounts with us. Additionally, the agreement limits our ability to take the following corporate actions without prior consent from
Silicon Valley Bank:



| |  |  | transfer all or any part of our business or properties, other than transfers made in the ordinary course of business;
| | - |  | ---------------------------------------------------------------------------------------------------------------------



28



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##### Table of Contents

| |  |  | engage in any business other than the business in which we are currently engaged;
| | - |  | ---------------------------------------------------------------------------------



| |  |  | merge or consolidate with any other person, or acquire, all or substantially all of the capital stock or property of another person, subject to
certain exceptions;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | create, incur, assume, or be liable for any indebtedness, other than certain permitted indebtedness;
| | - |  | ----------------------------------------------------------------------------------------------------



| |  |  | pay any dividends or make any distribution or payment or redeem, retire or purchase any capital stock, subject to certain exceptions;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------



| |  |  | create, incur, allow or suffer any lien on any of our property, including without limitation intellectual property, assign or convey any right to
receive income;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | directly or indirectly enter into or permit to exist any material transaction with any of our affiliates, subject to certain exceptions; and
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | make or permit any payment on any subordinated debt.
| | - |  | ----------------------------------------------------

In the event we were to violate any covenants or if Silicon Valley Bank deems there to have been a material adverse
change, including (1) a material impairment in the perfection or priority of Silicon Valley Banks lien in the collateral or in the value of such collateral, (2) a material adverse change in our business, operations or condition
(financial or otherwise), or (3) a material impairment of the prospect of repayment of any portion of our obligations, we would seek to obtain a waiver from Silicon Valley Bank. If we were unable to obtain a waiver, we would be in default under
the loan and security agreement, which would entitle Silicon Valley Bank to exercise their remedies, including the right to accelerate the debt, upon which we may be required to repay all amounts then outstanding under the loan and security
agreement.

As of March 31, 2011, we were in compliance with all financial covenants.

In February 2011, we entered, directly and through a wholly-owned subsidiary, into patent and technology license,
sublicense and purchase agreements with Philips to allow them to develop and commercialize the non-robotic applications of our Fiber Optic Shape Sensing and Localization (FOSSL) technology. Additionally, we amended the extended joint development
agreement, which increased the amount of funding provided by Philips for the development of the Vascular System and could potentially extend and increase certain royalty fees to be paid to Philips based on sales of the Vascular System. Under the
agreements, we received upfront payments of $29.0 million.

Cash flow activity for the three months ended
March 31, 2011 and 2010 is summarized as follows:



|                                                     |  |                              |         |  |      |   |         | 
|---------------------------------------------------- |  | ---------------------------- | ------- |  | ---- | - | ------- | 
|                                                     |  | Three months ended March 31, |        
|                                                     |  | 2011                         |         |  | 2010 |  
|Cash provided by (used in) operating activities      |  | $                            | (6,481) |  |      | $ | (6,550) | 
|Cash provided by (used in) investing activities      |  |                              | 15,709  |  |      |   | 4,621   | 
|Cash used in financing activities                    |  |                              | (829)   |  |      |   | (844)   | 
|                                                     |  |                              |         |  |      |   |         | 
|Net increase (decrease) in cash and cash equivalents |  | $                            | 8,399   |  |      | $ | (2,773) | 
|                                                     |  |                              |         |  |      |   |         | 

Net Cash Used in Operating Activities

Net cash used in operating activities in the first quarter of 2011 and 2010 primarily reflects the net income (loss) for
those periods, exclusive of the gain on sale of intellectual property in 2011 and non-cash charges such as the gain on settlement of litigation in the first quarter of 2010, depreciation and amortization and stock-based compensation. Additionally,
net cash used in operating activities for the first quarter of 2011 was positively impacted by increases in accrued liabilities balances due to funding received from Philips but not yet recognized and was negatively impacted by decreases in accounts
payable and deferred revenue balances. Net cash used in operating activities for the first quarter of 2010 was positively impacted by the net effect of increased deferred revenue, deferred cost of goods sold and prepaid and other current assets
balances, due primarily to increases in deferred revenue and the associated costs of those revenues, and was also positively impacted by decreased accounts receivable balances and increased accounts payable balances.



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Net Cash Provided by Investing Activities

Net cash provided by investing activities for the first quarter of 2011 primarily relates to the proceeds from the sale of
intellectual property, partially offset by the investment of certain of the proceeds from the Philips agreements. Net cash provided by investing activities for the first quarter of 2010 primarily relates to the proceeds from and purchases of
investments as we managed our investment portfolio to provide interest income and liquidity.

Net Cash
Used in Financing Activities

Net cash used in financing activities for the first quarter of both 2011
and 2010 primarily related to repayments on our loan to Silicon Valley Bank, partially offset by proceeds from the exercise of stock options.

Future Capital Requirements

We recognized our first
revenues in 2007 and have not achieved sustained profitability nor generated net income for any year and do not expect to do so this year. We have experienced significant fluctuations in quarterly shipments and revenues and, beginning in the fourth
quarter of 2008 and continuing through the first quarter of 2011, we saw many potential customers lengthen their sales cycles and postpone purchase decisions. In an attempt to reduce our future spending, we reduced our work force in the third
quarter of 2008 and again in the first and third quarters of 2009. We anticipate that we will continue to incur substantial net losses for at least the next year as we continue to commercialize our products, maintain and develop the corporate
infrastructure required to manufacture and sell our products at sufficient levels and profit margins and operate as a publicly traded company as well as continue to develop new products and pursue additional applications for our technology platform
including our Vascular System.

While we expect to continue to use cash in operations, we believe our existing
cash, cash equivalents and short-term investment balances as of March 31, 2011 and the interest income we earn on these balances in addition to funding amounts expected to be received from Philips under our extended joint development agreement
and the amounts estimated to be received through the sale of our products will be sufficient to meet our anticipated cash requirements through at least the next twelve months. However, at any time we may decide to raise additional funding by selling
equity or debt securities, entering into future research and development funding arrangements or entering into a credit facility in order to meet our continuing cash needs. If such financing or funding arrangements, which may occur at any time, do
not meet our longer term needs or if our cash flows from operating activities are significantly less than we expect, we may be required to adopt additional cost-cutting measures, including additional reductions in our work force, reducing the scope
of, delaying or eliminating some or all of our planned research, development and commercialization activities and/or reducing marketing, customer support or other resources devoted to our products. Any of these factors could harm our financial
condition. Failure to raise additional funding or manage our spending may adversely impact our ability to achieve our long term intended business objectives. We will continue to evaluate the extent of our implemented cost-saving measures based upon
future economic conditions and the achievement of estimated revenue and will consider the implementation of additional cost reductions if and as circumstances warrant.

If we seek additional funding in the future by selling additional equity or debt securities or entering into a credit
facility, such additional funding may result in substantial dilution to existing stockholders, may contain unfavorable terms or may not be available on any terms. If we are unable to obtain any needed additional funding, we may be required to reduce
the scope of, delay, or eliminate some or all of, our planned research, development and commercialization activities or to license to third parties the rights to commercialize products or technologies that we would otherwise seek to commercialize
ourselves or on terms that are less attractive than they might otherwise be, any of which could materially harm our business. The timing and exact amounts of our capital requirements will depend on many factors, including but not limited to the
following:



| |  |  | our ability to maintain compliance with debt covenants;
| | - |  | -------------------------------------------------------



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| |  |  | the cash collected from and the revenue and margins generated by sales of our current and future products;
| | - |  | ----------------------------------------------------------------------------------------------------------



| |  |  | the terms and timing of any collaborative, licensing or other arrangements that we may establish;
| | - |  | -------------------------------------------------------------------------------------------------



| |  |  | the success of our research and development efforts and the timing of milestone payments related to those efforts;
| | - |  | ------------------------------------------------------------------------------------------------------------------



| |  |  | our ability to generate revenue in a time of overall economic uncertainty;
| | - |  | --------------------------------------------------------------------------



| |  |  | the expenses we incur in manufacturing, marketing and selling our products, developing new products and operating our company;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------



| |  |  | our ability to achieve and maintain manufacturing cost reductions;
| | - |  | ------------------------------------------------------------------



| |  |  | our ability to achieve and maintain operating cost reductions;
| | - |  | --------------------------------------------------------------



| |  |  | the rate of progress and cost of our clinical trials and other development activities;
| | - |  | --------------------------------------------------------------------------------------



| |  |  | the cost and timing of future regulatory actions;
| | - |  | -------------------------------------------------



| |  |  | the costs of filing, prosecuting, defending and enforcing any patent claims and other intellectual property or other legal rights, or participating
in litigation-related activities;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the costs of defending against lawsuits brought against us or individuals indemnified by us;
| | - |  | --------------------------------------------------------------------------------------------



| |  |  | the emergence of competing or complementary technological developments; and
| | - |  | ---------------------------------------------------------------------------



| |  |  | the acquisition of businesses, products and technologies.
| | - |  | ---------------------------------------------------------

We cannot guarantee that future equity or debt financing or credit facilities will be available in amounts or on terms
acceptable to us, if at all. This could leave us without adequate financial resources to fund our operations as presently conducted or as we plan to conduct them in the future.

Contractual Obligations

The following table summarizes our outstanding contractual obligations as of March 31, 2011:



|                              |  |                                       |        |  |                 |   |       |           |  |   |           |  |  |   |       | 
|----------------------------- |  | ------------------------------------- | ------ |  | --------------- | - | ----- | --------- |  | - | --------- |  |  | - | ----- | 
|                              |  | Payments Due by Period (in thousands) |       
|Contractual Obligations       |  | Total                                 |        |  | Less than1 Year |   |       | 1-3 Years |  |   | 3-5 years | 
|Operating lease  real estate |  | $                                     | 7,551  |  |                 | $ | 1,414 |           |  | $ | 4,079     |  |  | $ | 2,058 | 
|Debt, including interest      |  |                                       | 6,359  |  |                 |   | 2,868 |           |  |   | 3,491     |  |  |   |      | 
|                              |  |                                       |        |  |                 |   |       |           |  |   |           |  |  |   |       | 
|Total                         |  | $                                     | 13,910 |  |                 | $ | 4,282 |           |  | $ | 7,570     |  |  | $ | 2,058 | 
|                              |  |                                       |        |  |                 |   |       |           |  |   |           |  |  |   |       | 

The table above reflects only payment obligations that are fixed and determinable. Our
commitments for operating leases relate principally to the lease for our corporate headquarters in Mountain View, California. Current future debt payments relate to principal and interest payments related to the $12.5 million we have borrowed under
our term equipment line with Silicon Valley Bank. Additionally, we have minimum royalty obligations of $100,000 per year under a license agreement with Mitsubishi Electric Research Laboratories, Inc. which reduces to $55,000 per year if the license
becomes non-exclusive. The royalty obligation expires in 2018. We also have minimum royalty obligations of $200,000 per year under the terms of our cross license agreement with Intuitive. We have a joint development agreement with Philips which
provides for the payment of royalties to Philips based on sales of the Vascular System, subject to caps based on the amounts Philips contributes to the development. As of March 31, 2011, Philips had contributed a total of $11.0 million to us
under the extended joint development agreement, including $6.0 million provided pursuant to our February 2011 agreements with Philips.



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Recent Accounting Pronouncements

See Note 2 to our condensed consolidated financial statements under the caption Recent Accounting
Pronouncements for information regarding new accounting guidance that will impact our financial statements and disclosures.

ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

In the normal course of business, our financial position is subject to a variety of risks, including market risk associated with interest rate movements and foreign currency exchange risk. We regularly
assess these risks and have established policies and business practices to protect against these and other exposures. As a result, we do not anticipate material potential losses in these areas.

The primary objective for our investment activities is to preserve principal while maximizing yields without
significantly increasing risk. This is accomplished by investing in widely diversified short-term investments, consisting primarily of investment grade securities. As of March 31, 2011, the fair value of our cash, cash equivalents and
short-term investments was approximately $45.1 million, the majority of which will mature in one year or less. A hypothetical 50 basis point increase in interest rates would not result in a material decrease or increase in our interest income nor in
the fair value of our available-for-sale securities. We have no investments denominated in foreign country currencies and therefore our investments are not subject to foreign currency exchange risk.

A portion of our operations consist of sales activities outside of the United States and, as such, we have foreign
currency exposure to non-United States dollar revenues and accounts receivable. Currently, we sell our products mainly in United States dollars, Euros and Great Britain Pounds although we may in the future transact business in other currencies.
Future fluctuations in the exchange rates of these currencies may impact our revenues. In the past, we have not hedged our exposures to foreign currencies or entered into any other derivative instruments and we have no current plans to do so. For
the quarter ended March 31, 2011, sales denominated in foreign currencies were approximately 13% of total revenue. A hypothetical 10% increase in the United States dollar exchange rate used would have resulted in a decrease of approximately
$68,000 in revenues for the first quarter of 2011.

ITEM 4. CONTROLS AND PROCEDURES

Evaluation of Disclosure Controls and Procedures

Our senior management is responsible for establishing and maintaining a system of disclosure controls and procedures (as
defined in Rule 13a-15e and 15d-15e under the Securities Exchange Act of 1934 (the Exchange Act)) designed to ensure that information required to be disclosed by us in the reports that we file or submit under the Exchange Act is
recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commissions rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to
ensure that information required to be disclosed by an issuer in the reports that it files or submits under the Exchange Act is accumulated and communicated to the issuers management, including its principal executive officer or officers and
principal financial officer or officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.



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Changes in Internal Control Over Financial Reporting

Our management, including our Chief Executive Officer and Interim Chief Financial Officer, evaluated our internal
control over financial reporting as defined in Exchange Act Rule 13a-15(f) to determine whether any changes in our internal control over financial reporting occurred during the first quarter of 2011 that materially affected, or are reasonably
likely to materially affect, our internal control over financial reporting. Based on that evaluation, there were no changes in our internal control over financial reporting during the quarter ended March 31, 2011 that have materially affected,
or are reasonably likely to materially affect our internal control over financial reporting.

Limitations of the
Effectiveness of Controls

We are committed to continuing to improve our internal control processes and
will continue to diligently review our financial reporting controls and procedures in order to ensure compliance with the requirements of the Sarbanes-Oxley Act and the related rules promulgated by the Securities and Exchange Commission. However,
because of the inherent limitations in all control systems, any control system, regardless of how well designed, operated and evaluated, can provide only reasonable, not absolute, assurance that the control objectives will be met. The design of any
system of controls is based, in part, on certain assumptions about the likelihood of future events, and there can be no assurance that any design will succeed in achieving its stated goals under all potential future conditions. Over time, controls
may become inadequate because of changes in conditions or deterioration in the degree of compliance with policies or procedures.

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

Following our October 19, 2009 announcement that we would restate
certain of our financial statements, a securities class action lawsuit was filed on October 23, 2009 in the United States District Court for the Northern District of California, naming us and certain of our officers. Curry v. Hansen Medical,
Inc. et al., Case No. 09-05094. The complaint asserts claims for violation of Sections 10(b) and 20(a) of the Securities Exchange Act of 1934 on behalf of a putative class of purchasers of Hansen stock between May 1, 2008 and
October 18, 2009, inclusive, and alleges, among other things, that defendants made false and/or misleading statements and/or failed to make disclosures regarding our financial results and compliance with GAAP while improperly recognizing
revenue; that these misstatements and/or nondisclosures resulted in overstatement of our revenue and financial results and/or artificially inflated our stock price; and that following our October 19, 2009 announcement, the price of our stock
declined. On November 4, 2009 and November 13, 2009, substantively identical complaints were filed in the Northern District of California by other purported Hansen stockholders asserting the same claims on behalf of the same putative class
of Hansen stockholders. Livingstone v. Hansen Medical, Inc. et al., Case No. 09-05212 and Prenter v. Hansen Medical, Inc., et al., Case No. 09-05367. All three complaints seek certification as a class action and unspecified compensatory
damages plus interest and attorneys fees. On December 22, 2009, two purported Hansen stockholders, Mina and Nader Farr, filed a joint application for appointment as lead plaintiffs and for consolidation of the three actions. On
February 25, 2010, the Court issued an order granting Mina and Nader Farrs application for appointment as lead plaintiffs and consolidating the three securities class actions. On July 15, 2010, the Court entered an order granting
lead plaintiffs motion for leave to file a second amended complaint. Lead plaintiffs second amended complaint, in addition to alleging that shareholders suffered damages as a result of the decline in our stock price following the
October 19, 2009 announcement, also alleges that shareholders suffered additional damages as the result of share price declines on July 28, 2009, July 31, 2009, January 8, 2009, July 6, 2009, and
August 4, 2009, all of which lead plaintiffs allege were caused by the disclosure of what they claim was previously misrepresented information. The hearing on defendants motion to dismiss was held on March 4, 2011. The Court took the
matter under submission. We and the named officers intend to defend ourselves vigorously against these actions.



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On November 12, 2009, Dawn Cates, a purported stockholder of Hansen,
filed a shareholder derivative complaint in the Superior Court of the State of California, County of Santa Clara, against the current members of our Board of Directors and certain of our current and former officers (the Individual
Defendants), as well as our former independent auditor, PricewaterhouseCoopers LLP (PwC). Cates v. Moll, et al., Case No 09cv157170 (the Cates Action). The Cates Action purports to be brought on behalf of Hansen. The
complaint asserts claims for breach of fiduciary duties and waste of corporate assets against the Individual Defendants, and professional negligence against PwC. The complaint alleges that the Individual Defendants disseminated false and misleading
information in our SEC filings, public statements and other disclosures, failed to maintain adequate internal controls and willfully ignored problems with accounting and internal control practices and procedures, mismanaged and failed appropriately
to oversee our operations, and wasted corporate assets. The complaint further alleges that the director defendants breached their fiduciary duties by allowing defendant Christopher Sells to resign from Hansen. The complaint seeks unspecified
damages, internal control and corporate governance reforms, restitution and an award of costs and fees incurred in bringing the action. A substantively identical complaint (although without any claims against PwC) was filed in Santa Clara Superior
Court on November 19, 2009. Daneshmand v. Moll, et al., Case No. 09cv157592 (the Daneshmand Action). On December 22, 2009, the Santa Clara Superior Court entered an order consolidating the Cates and Daneshmand Actions and
renaming the actions as In re Hansen Medical, Inc. Shareholder Derivative Litigation, Case No. 09cv157170. Plaintiffs designated their operative complaint on August 30, 2010. Defendants filed their demurrer to the complaint on
April 18, 2011. The hearing on the demurrer is set for Jun 27, 2011.

On December 15, 2009, Michael
Brown, a purported stockholder of Hansen, filed a shareholder derivative complaint in the United States District Court for the Northern District of California. Brown v. Moll, et al., Case No. 09-05881 (the Brown Action). The
allegations of complaint in the Brown Action are substantively identical to the allegations of the Cates and Daneshmand Actions (the Brown Action does not name PwC as a defendant). On July 21, 2010, the Court in the Brown Action granted
Defendants Motion to Dismiss on the ground that Plaintiff had not alleged facts sufficient to establish demand futility. The Court granted Plaintiff leave to amend. Plaintiffs filed their amended complaint on August 9, 2010. On
November 12, 2010, the Court granted Defendants motion to dismiss, with prejudice. Plaintiff filed his opening brief in the appeal on April 6, 2011. Defendants response is due on May 30, 2011.

The Individual Defendants deny the allegations made in the Cates, Daneshmand and Brown Actions and intend to defend
themselves vigorously against those claims.

On December 1 and December 14, 2009, we received
letters from counsel for purported Hansen stockholders Naoum Baladi and Robert Rogowski demanding that our Board of Directors take action to remedy breaches of fiduciary duty by the directors and certain officers of Hansen and professional
negligence by our outside auditor PricewaterhouseCoopers, LLP. These letters recite essentially the same allegations as are contained in the Cates Action and demand that our Board take action against the officers and directors, and PwC, to
recover damages incurred by us and to correct deficiencies in our internal controls. The letters state that if, within a reasonable time, our Board has not commenced the requested action or if our Board refuses to commence the requested action, the
named stockholders will commence derivative actions. On July 9, 2010, we received a letter from counsel for purported Hansen stockholder Kathy Fox demanding that we investigate and bring legal action to remedy possible breaches of
fiduciary duty and other potential violations of law by certain of our directors, officers and insiders. Our Board, with the assistance of an independent counsel, has completed its investigation regarding the allegations set forth by Baladi,
Rogowski and Fox in their letters. Our Board has notified counsel for each of Baladi, Rogowski and Fox that it has determined, in the exercise of its business judgment, that any litigation would not be in our best interests and it affirmatively
objects to the commencement of any litigation on our behalf. On January 11, 2011, we received a letter from counsel for purported Hansen stockholder Dawn Cates demanding that our Board take action to remedy possible breaches of fiduciary
duty and other potential violations of law by certain of our directors, officers and insiders, and PwC. On January 18, 2011 our Board responded to counsel for Cates, indicating that it has determined, in the exercise of its business
judgment, that any litigation would not be in our best interests, and it affirmatively objects to the commencement of any litigation on our behalf.



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On May 11, 2010, the Securities and Exchange Commission issued an Order
Directing Private Investigation and Designating Officers to Take Testimony to determine whether we or any other entities or persons have engaged in, or are about to engage in, any violations of the securities laws. We have cooperated with the
Securities and Exchange Commission on its investigation. We are in discussions with the staff of the Securities and Exchange Commission regarding possible resolution. Whether a negotiated resolution of this matter can be reached, the terms of the
resolution and the potential impact of any resolution are all uncertain.



|ITEM 1A. | RISK FACTORS
|-------- | ------------

Risks Related to Our Business

We have had material
weaknesses in internal control over financial reporting in the past and cannot assure you that additional material weaknesses will not be identified or develop in the future. If our internal control over financial reporting or disclosure controls
and procedures are not effective, there may be errors in our financial statements that could require a restatement or our filings may not be timely and investors may lose confidence in our reported financial information, which could lead to a
decline in our stock price.

Section 404 of the Sarbanes-Oxley Act of 2002 requires us to evaluate
the effectiveness of our internal control over financial reporting as of the end of each year, and to include a management report assessing the effectiveness of our internal control over financial reporting in each Annual Report on Form 10-K.
Section 404 also requires our independent registered public accounting firm to attest to, and report on, managements assessment of our internal control over financial reporting.

In assessing the results of an investigation conducted by the audit committee of our Board in 2009 as well as the
internal review and recertification procedures performed for purposes of the preparation and certification of our restated consolidated financial statements in November 2009, our management identified material weaknesses as of December 31, 2008
and December 31, 2007 that resulted in errors in our financial reporting with regard to our accounting for revenue recognition with respect to the sale of our Sensei Robotic Catheter Systems. Such errors resulted in a restatement of our audited
annual financial statements as of and for the years ended December 31, 2008 and December 31, 2007 and the unaudited interim financial statements as of and for the quarterly periods ended June 30, 2009, March 31,
2009, September 30, 2008, June 30, 2008 and March 31, 2008. Additionally, there were material weaknesses that resulted in audit adjustments in connection with the audit of our December 31, 2009 financial statements. Our
evaluation of our disclosure controls and procedures in association with our assessment of the effectiveness of internal control over financial statements as of December 31, 2009 determined that we did not maintain effective controls because we
did not maintain an effective control environment, we did not maintain effective information and communication, we did not maintain effective controls related to the process for ensuring completeness and accuracy of our accounting for revenue and
did not maintain effective controls over the accounting for complex arrangements. We have adopted various remedial measures to improve our disclosure controls and procedures. A more detailed description of these previously-reported material
weaknesses and the remedial measures adopted is set forth in Part II Item 9A Controls and Procedures in our Annual Report on Form 10-K for the year ended December 31, 2010.

We evaluated our disclosure controls and procedures in association with our assessment of the effectiveness of internal
control over financial reporting as of December 31, 2010 and determined that our internal control was effective as of that date. We cannot assure you, however, that significant deficiencies or material weaknesses in our internal control over
financial reporting will not exist in the future. Any failure to maintain or implement new or improved controls, or any difficulties we encounter in their implementation, could result in significant deficiencies or material weaknesses, cause us to
fail to timely meet our periodic reporting obligations, or result in material misstatements in our periodic reports, including the financial statements included in such reports. Any such failure could also adversely affect the results of periodic
management evaluations and annual auditor attestation reports regarding disclosure controls and the effectiveness of our internal control over financial reporting required under Section 404 of the Sarbanes-Oxley Act of 2002 and the rules
promulgated thereunder. The existence of a material weakness could result in errors in our financial statements that could result in a restatement of financial statements, cause us to fail to timely meet our reporting obligations and cause investors
to lose confidence in our reported financial information, leading to a decline in our stock price.



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The failure by Congress to timely approve an increase in the Federal
debt ceiling may result in the U.S. Treasury not making payments to agencies, including the FDA, that could result in a delay in our ability to obtain timely 510(k) clearance for our vascular robotic system.

The U.S. government is expected to reach its debt ceiling in the second quarter of 2011 and the U.S. Treasury is expected
to prioritize current federal government payments so that the Federal government could remain within the debt ceiling through the July-August 2011 timeframe. If the Congress does not approve an increase in the debt ceiling, or if the President
vetoes the legislation approved by the Congress, then the federal government may be shut down and non-essential federal employees, including many FDA employees, may be furloughed. We submitted a 510(k) pre-market notification application with the
FDA on April 11, 2011 for our Vascular System and catheter and accordingly, a federal government shutdown may cause significant delays in the FDAs ability to timely review and process our submission, which could have a material adverse
effect on our business.

We are a defendant in a class action lawsuit and two shareholder derivative
lawsuits that may adversely affect our financial condition, results of operations and cash flows.

We
and certain of our current and former executive officers and directors, are defendants in a federal securities class action lawsuit, a Federal shareholder derivative lawsuit, and a State shareholder derivative lawsuit. These lawsuits are described
in Part II Item 1 Legal Proceedings in this Quarterly Report on Form 10-Q. Our attention may be diverted from our ordinary business operations by these lawsuits and we may incur significant expenses associated with the defense of
these lawsuits (including substantial fees of lawyers and other professional advisors and potential obligations to indemnify officers and directors and our underwriters who may be parties to such action). Depending on the outcome of these lawsuits,
we may be required to pay material damages and fines, consent to injunctions on future conduct, or suffer other penalties, remedies or sanctions. The ultimate resolution of these matters could have a material adverse effect on our results of
operations, financial condition, liquidity, our ability to meet our debt obligations and, consequently, negatively impact the trading price of our common stock.

We are under investigation by the Securities and Exchange Commission and whether a negotiated resolution of this
matter can be reached, the terms of any such resolution and the potential impact of any resolution are all uncertain and may have a material adverse effect on our business.

The Securities and Exchange Commission has issued an Order Directing Private Investigation and Designating Officers to
Take Testimony to determine whether we or any other entities or persons have engaged in, or are about to engage in, any violations of the securities laws. We have cooperated with the Securities and Exchange Commission on its investigation. We are in
discussion with the staff of the Securities and Exchange Commission regarding possible resolution. Whether a negotiated resolution of this matter can be reached, the terms of any such resolution and the potential impact of any resolution are all
uncertain and may have a material adverse effect on our business.

The matters relating to the
investigation by the audit committee of our Board of Directors and the restatement of our consolidated financial statements may result in governmental enforcement actions and additional litigation.

On October 15, 2009, the audit committee of our Board of Directors, upon the recommendation of management, concluded
that the previously issued financial statements contained in our annual report on Form 10-K for the year ended December 31, 2008, and our quarterly reports on Form 10-Q for the quarters ended March 31, 2008, June 30,
2008, September 30, 2008, March 31, 2009 and June 30, 2009 (collectively, the Prior Periods) should no longer be relied upon because of errors in those financial statements, some of which arose from potential
irregularities outside of the accounting department. On November 9, 2009, the audit committee of our Board of Directors, upon recommendation of management, concluded that the previously issued financial statements contained in our annual report
on Form 10-K for the year ended December 31, 2007 should also no longer be relied upon because of an error in those financial statements regarding the recognition of revenue on one Sensei Robotic Catheter System sold to a distributor in the
quarter ending December 31, 2007. As a result of our investigation, we identified systems for which revenue should have been recognized in a later period than the period in which it was recognized and revenue on systems that should have been
deferred.



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The internal review, the independent investigation, and related activities
have required us to incur substantial expenses for legal, accounting, tax and other professional services, and have diverted managements attention from our business. As a result of the restatement, we have become subject to a number of risks
and uncertainties, including the potential for additional stockholder litigation and governmental investigations, the possibility of governmental enforcement actions and the possibility that the restatement could impact our relationship with
customers and our ability to generate revenue and we will continue to incur additional restatement-related accounting and legal costs.

Continuing negative publicity may adversely affect our business.

As a result of the audit committee-led investigation, restatement of our financial statements and related matters as discussed herein, we have been the subject of negative publicity. This negative
publicity may have an effect on the terms under which some customers, lenders, landlords and suppliers are willing to continue to do business with us and could affect our financial performance and condition. We also believe that this negative
publicity could potentially cause certain of our employees to perceive themselves to be operating under stressful conditions, which may cause them to terminate their employment or, if they remain, result in reduced morale that could adversely affect
our business. Should we continue to be the subject of negative publicity, it could have a material adverse effect on our business.

Potential indemnification obligations to our current and former directors and officers and contractual indemnification obligations to underwriters of our securities offerings could adversely affect
us.

One of our current officers and employees, several individuals who are current members of our
Board of Directors and several former officers and former members of our Board of Directors are the defendants in pending lawsuits related to our restatement and other current or former officers, employees or directors may also be named as
defendants in those or other lawsuits. Under Delaware law, our charter documents and certain indemnification agreements, we may have an obligation to indemnify our current and former officers and employees and directors in relation to these matters
on certain terms and conditions. In addition, we have contractual indemnification obligations to the underwriters of our April 2008, April 2009 and April 2010 public offerings of shares of our common stock. These indemnification obligations to
directors, officers, employees and our underwriters are generally unlimited in nature and some of these indemnification obligations may not be covered by our directors and officers insurance policies. If we incur significant uninsured
indemnity obligations, this could have a material adverse effect on our business, results of operations, financial condition and cash flows.

We are a company with a limited history of operations, which makes our future operating results difficult to predict.

We are a medical device company with a limited operating history and first recognized revenues in the second quarter of
2007. Prior to the second quarter of 2007, we were a development stage company. We have been engaged in research and product development since our inception in late 2002. Our Sensei Robotic Catheter System, or Sensei system, and our corresponding
disposable Artisan catheter received FDA clearance in May 2007 for commercialization to facilitate manipulation, positioning and control of certain mapping catheters during electrophysiology procedures. We also received the CE Mark in Europe for our
Sensei system in September 2006, for our Artisan catheter in May 2007 and for our Lynx catheter in September 2010. As of March 31, 2011, we have also received regulatory approvals in Russia, Thailand, Taiwan, Australia and India. The future
success of our business will depend on our ability to design and obtain regulatory approval for new products, manufacture and assemble our current and future products in sufficient quantities in accordance with applicable regulatory requirements and
at lower costs, increase product sales and successfully support and service our products, all of which we may be unable to do. We have a limited history of operations upon which you can evaluate our business and our operating expenses have increased
significantly. Our lack of a significant operating history also limits your ability to make a comparative evaluation of us, our products and our prospects. If we are unable to successfully operate our business, our business and financial condition
will be harmed.



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We may not be able to develop and commercialize our Vascular System as
planned.

We intend to develop and commercialize our Vascular System, consisting of a novel robotic
platform and suite of catheters for vascular procedures. Due to the advanced electrical, mechanical, and sensing capabilities of the new robotic platform, we may encounter challenges in designing, engineering and manufacturing the platform to
function as intended, which may lead to compatibility obstacles with operating room and catheter laboratory layouts, equipment quality or performance issues, unmet customer expectations regarding features or functionality or other defects in the
platform. Any such difficulties could result in delays in our submissions to regulatory agencies, delays in achieving or the failure to achieve regulatory approval for the system, lack of physician adoption of our system, higher than expected
service claims, litigation and negative press coverage. We will not be able to sell our Vascular System for clinical use until we receive regulatory approval to do so and such approval may not be obtained on a timely basis, or at all, or on terms
that are necessary for a successful product introduction. Furthermore, we have not previously manufactured the robotic platform for vascular intervention and we may encounter unexpected manufacturing problems when scaling up the production of the
new platform. Any of these issues could negatively impact our financial condition and results of operations.

If we fail to obtain the necessary FDA clearance and CE mark for our Vascular System we will be unable to
commercially distribute and market the system as planned.

We submitted a 510(k) pre-market
notification application with the FDA on April 11, 2011 for our Vascular System and currently are in the process of applying for a CE Mark for the system. Seeking to obtain clearances or approvals from the FDA and other regulatory authorities,
as we are doing for our Vascular System currently under development, could result in unexpected and significant costs for us and consume managements time and other resources. The FDA or other regulatory authorities could ask us to supplement
our submissions, collect non-clinical data, conduct clinical trials or engage in other time-consuming or costly actions, or it could simply deny our applications. Seeking new approvals could also result in the FDA or other regulatory authorities
reviewing prior submissions and modifying or revoking prior approvals. In addition, clearance or approval could be revoked or other restrictions imposed if post-market data demonstrates safety issues or lack of effectiveness. We cannot predict with
certainty how, or when, the FDA or other regulatory authorities will act with regard to our initial applications with respect to the Vascular System, future applications with respect to the system or applications for other products. If we are unable
to obtain clearances for our proposed Vascular System on a timely basis, or at all, or on terms that are necessary for a successful product introduction, our financial condition and cash flow may be adversely affected, and our ability to grow
domestically and internationally may be limited.

If Philips is unable to develop new products or
applications for our FOSSL technology, or such products are not commercially viable, we may not realize the full benefits of our agreements with Philips which would harm our results of operations and could delay and or impair our ability monetize
that technology.

The realization of the full potential benefits of our agreements with Philips,
including the receipt of any of the up to $78.0 million in future payments associated with the successful commercialization by Philips or its collaborators of products containing the FOSSL technology, requires the development of new products and
applications of technology that are subject to design, engineering and manufacturing challenges, potential safety and regulatory issues that could delay, suspend or terminate clinical studies, regulatory approvals or sales, and our reliance on third
parties to develop, obtain regulatory approval for, manufacture, market and sell products containing FOSSL technology. Under certain circumstances, we have the right to reacquire certain of the rights licensed to Philips, however, there can be no
assurance that we would have the capital resources to exercise such rights or that we could find another commercial partner or develop commercially such technologies. In either event, we would be unable to realize the full financial benefits of our
agreements with Philips and may be delayed or unable to monetize our FOSSL technology in other areas, harming our research and development efforts and adversely affecting our business.



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We may be unable to complete our trial for the treatment of atrial
fibrillation or other future trials, or we may experience significant delays in completing our clinical trials, which could prevent or delay regulatory approval of our Sensei system for expanded uses and impair our financial position.

We have received IDE approval to investigate the use of our Artisan catheter in the treatment of
atrial fibrillation in a clinical study designed to support the expansion of our current labeling in the U.S. beyond mapping. The study will involve approximately 300 patients and involves the treatment of atrial fibrillation. We enrolled our first
patient in May 2010. We may modify the timing of planned enrollment in the future to minimize expenditures.

Enrollment of patients in the trial could be delayed for a variety of reasons, including:



| |  |  | reaching agreement on acceptable terms with prospective clinical trial sites;
| | - |  | -----------------------------------------------------------------------------



| |  |  | obtaining additional institutional review board approval to conduct the trial at prospective sites; and
| | - |  | -------------------------------------------------------------------------------------------------------



| |  |  | obtaining sufficient patient enrollment, which is a function of many factors, including the size of the patient population, the nature of the
protocol, the willingness of patients to randomize to manual catheter control, the proximity of patients to clinical sites and the eligibility criteria for the trial.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

In addition, the completion of the trial, and any future clinical trials, could be delayed, suspended or terminated for
several reasons, including:



| |  |  | ongoing discussions with regulatory authorities regarding the scope or design of our preclinical results or clinical trial or requests for
supplemental information with respect to our preclinical results or clinical trial results;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | our failure or inability to conduct the clinical trials in accordance with regulatory requirements;
| | - |  | ---------------------------------------------------------------------------------------------------



| |  |  | sites participating in the trial may drop out of the trial, which may require us to engage new sites or petition the FDA for an expansion of the
number of sites that are permitted to be involved in the trial;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | patients may not enroll in, remain in or complete, the clinical trial at the rates we expect;
| | - |  | ---------------------------------------------------------------------------------------------



| |  |  | patients in either the control or test arm of the trial may experience serious adverse events or side effects during the trial, which, whether or
not related to our products, could cause the FDA or other regulatory authorities to place the clinical trial on hold; and
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | clinical investigators may not perform our clinical trials on our anticipated schedule or consistent with the clinical trial protocol and good
clinical practices.
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------

If our clinical trials are delayed it will take us longer to
commercialize a product for the treatment of atrial fibrillation and generate revenues from such product. Moreover, our development costs will increase if we have material delays in our clinical trials or if we need to perform more or larger
clinical trials than planned.

Even if we complete our trial for the treatment of atrial fibrillation or
other clinical trials, these trials may not produce results that are sufficient to support approval of a PMA or 510(k) application.

We will consider our Sensei system to be effective if the trial for the treatment of atrial fibrillation demonstrates non-inferiority to manual control of the NaviStar Thermocool catheter, but there is a
risk that, even if we achieve our trial endpoints, the FDA may not approve our Sensei system for use in the treatment of atrial fibrillation. In addition, there is a risk that the FDA may require us to conduct a larger or longer clinical trial,
submit additional follow-up data, or engage in other costly and time consuming activities that may delay the FDAs approval of the Sensei system for use in atrial fibrillation. Although we plan to file a 510(k) application based on data from
our trial for the use of Sensei system in the treatment of atrial fibrillation, the FDA may require a us to file a PMA, which is more time consuming and costly. If our clinical trials fail to produce sufficient data to support a PMA or 510(k)
application, it will take us longer to ultimately commercialize a product for the treatment of atrial fibrillation, or any other intended treatment, and generate revenue or the delay could result in our being unable to do so. Moreover, our
development costs will increase if we need to perform more or larger clinical trials than planned.



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Even if we obtain the necessary regulatory approvals, our efforts to
commercialize our systems for atrial fibrillation or vascular disease, we may not succeed or may encounter delays which could significantly harm our ability to generate revenue.

If we obtain regulatory approval to market our Sensei system for uses other than mapping electrophysiology procedures,
such as for the treatment of atrial fibrillation, or our Vascular System under development for the treatment of vascular disease, our ability to generate revenue will depend upon the successful commercialization of our Sensei system and our Vascular
System for such indications. Our efforts to commercialize our Sensei system or our Vascular System may not succeed for a number of reasons, including:



| |  |  | our systems may not be accepted in the marketplace for other treatments by physicians;
| | - |  | --------------------------------------------------------------------------------------



| |  |  | we may not be able to sell our systems and associated catheters at prices that allows us to meet the revenue targets necessary to generate revenue
for profitability;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | we, or the investigators of our product, may not be able to have information on the outcome of the trials published in medical journals;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the availability and perceived advantages and disadvantages of alternative treatments;
| | - |  | --------------------------------------------------------------------------------------



| |  |  | any rapid technological change may make our products obsolete;
| | - |  | --------------------------------------------------------------



| |  |  | we may not be able to have our systems or catheters manufactured in commercial quantities or at an acceptable cost;
| | - |  | -------------------------------------------------------------------------------------------------------------------



| |  |  | we may not have adequate financial or other resources to complete the development and commercialization of our systems; and
| | - |  | ---------------------------------------------------------------------------------------------------------------------------



| |  |  | we may be sued for infringement of intellectual property rights and could be enjoined from manufacturing or selling our products.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------

If we are not successful in the commercialization of our Sensei system for uses other than
for mapping in electrophysiology procedures or the development and commercialization of our Vascular System, we may never achieve sustained profitability and may be forced to cease operations.

We have a debt facility with Silicon Valley Bank that requires us to meet certain restrictive covenants that may
limit our operating flexibility.

In August 2008, we entered into a $25.0 million loan and security
agreement with Silicon Valley Bank, consisting of a $15.0 million term equipment loan and a one-year $10.0 million revolving credit line, which expired in August 2009. We have drawn down approximately $12.5 million on the term equipment loan and,
per the original agreement terms, the remainder of the term equipment loan is no longer available. The facility is collateralized by substantially all of our assets, excluding intellectual property, and is subject to certain covenants, including
maintaining the required liquidity, achieving EBITDA amounts to be specified and fulfilling certain reporting requirements. The liquidity covenants require us to maintain at the end of each month either liquid assets in the amount of 1.5 times the
outstanding loan balance or sufficient liquidity to fund at least six months of projected operations, whichever is greater. Silicon Valley Bank has yet to determine the quarterly EBITDA covenant amounts with us. As of March 31, 2011, we were in
compliance with all financial covenants that had been determined at that date. Moreover, the agreement limits our ability to take the following corporate actions without prior consent from Silicon Valley Bank:



| |  |  | transfer all or any part of our business or properties, other than transfers made in the ordinary course of business;
| | - |  | ---------------------------------------------------------------------------------------------------------------------



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| |  |  | engage in any business other than the business in which we are currently engaged;
| | - |  | ---------------------------------------------------------------------------------



| |  |  | merge or consolidate with any other person, or acquire, all or substantially all of the capital stock or property of another person, subject to
certain exceptions;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | create, incur, assume, or be liable for any indebtedness, other than certain permitted indebtedness;
| | - |  | ----------------------------------------------------------------------------------------------------



| |  |  | pay any dividends or make any distribution or payment or redeem, retire or purchase any capital stock, subject to certain exceptions;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------



| |  |  | create, incur, allow or suffer any lien on any of our property, including without limitation intellectual property, assign or convey any right to
receive income;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | directly or indirectly enter into or permit to exist any material transaction with any of our affiliates, subject to certain exceptions; and
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | make or permit any payment on any subordinated debt.
| | - |  | ----------------------------------------------------

In the event we were to violate any covenants or if Silicon Valley Bank deems there to have been a material adverse
change, including (1) a material impairment in the perfection or priority of Silicon Valley Banks lien in the collateral or in the value of such collateral, (2) a material adverse change in our business, operations or condition
(financial or otherwise), or (3) a material impairment of the prospect of repayment of any portion of our obligations, we would seek to obtain a waiver from Silicon Valley Bank. If we were unable to obtain a waiver, we would be in default under
the loan and security agreement, which would entitle Silicon Valley Bank to exercise their remedies, including the right to accelerate the debt, upon which we may be required to repay all amounts then outstanding under the loan and security
agreement. Complying with these covenants may make it more difficult for us to successfully execute our business strategy.

Credit, financial market and general economic conditions could delay or prevent potential customers from purchasing our products, which would adversely affect our sales, financial condition and
results of operation.

The sale of a Sensei system often represents a significant capital purchase for
our customers and many customers finance their purchase of a Sensei system through a credit facility or other financing. If prospective customers that need to finance their capital purchases are not able to access the credit or capital markets on
terms that they consider acceptable, they may decide to postpone or cancel a potential purchase of a Sensei system. Potential customers with limited capital budgets may decide to spend those dollars on other technologies rather than on our products.
Also, even customers with sufficient financial resources to make such purchases without resorting to the credit and capital markets may be less likely to make capital purchases during periods when they view the overall economic conditions
unfavorably or with uncertainty. Many potential customers have delayed making a decision to purchase a Sensei system, which has significantly impacted our sales, financial condition and results of operations. We believe that the macroeconomic
environment and the deterioration in confidence and spending have impacted and will continue to impact potential customers and their decisions to purchase our products into the foreseeable future. We cannot predict the timing, strength or duration
of any economic slowdown or subsequent recovery, whether worldwide, regional or specific to our industry, nor the extent of its potential impact on our future sales, financial condition and results of operations.



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We have limited sales, marketing and distribution experience and
capabilities, which could impair our ability to achieve sustained profitability.

In the second quarter
of 2007, we received clearance to market, sell and distribute our Sensei system for use in the mapping of electrophysiology procedures in the United States and Europe. We had no prior experience as a company in undertaking these efforts. In the
United States, we market our Sensei system and Artisan catheter through a direct sales force of regional sales employees, supported by clinical account managers who provide training, clinical support and other services to our customers. Our direct
sales force competes against the experienced and well-funded sales organizations of our competitors. Our revenues will depend largely on the effectiveness of our sales force. We face significant challenges and risks related to our direct sales force
and the marketing of our current and future products, including, among others:



| |  |  | the ability of sales personnel to obtain access to or persuade adequate numbers of hospitals to purchase our system and catheters or physicians to
use our system and catheters;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | our ability to retain, properly motivate, recruit and train adequate numbers of qualified sales and marketing personnel;
| | - |  | ------------------------------------------------------------------------------------------------------------------------



| |  |  | the costs associated with an independent sales and marketing organization, hiring, maintaining and expanding an independent sales and marketing
organization; and
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | our ability to promote our products effectively while maintaining compliance with government regulations and labeling restrictions with respect to
the healthcare industry.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Outside the United States, primarily in the European Union, we are
establishing a combination of a direct sales force and distributors to market, sell and support our current and future products. If we fail to select and maintain appropriate distributors, appropriately disengage from unsuccessful distributors or
effectively use our distributors or sales personnel and coordinate our efforts for distribution of our Sensei system and catheters in the European Union or if their and our sales and marketing strategies are not effective in generating sales of our
system, our revenues would be adversely affected and we may never become profitable on a sustained basis.

We have limited experience in manufacturing and assembling our products and may encounter problems at our
manufacturing facilities or otherwise experience manufacturing delays that could result in lost revenue or diminishing margins.

We do not have significant experience in manufacturing, assembling or testing our current products on a commercial scale. In addition, for our Sensei system, we subcontract the manufacturing of major
components and complete the final assembly and testing of those components in-house. We face challenges in order to produce our Sensei system and disposable catheters effectively, to appropriately phase in new products and product designs, to
efficiently utilize our new manufacturing facility and to achieve planned manufacturing cost reductions. These challenges include equipment design and automation, material procurement, low or variable production yields on Artisan catheters and
quality control and assurance. The costs resulting from these challenges and our relocation to a larger facility have had and will continue to have a significant impact on our gross margins and may result in significant fluctuations of gross margins
from quarter to quarter. We may not successfully complete required manufacturing changes or planned improvements in manufacturing efficiency on a timely basis or at all. For example, as we were increasing our manufacturing capacity for Artisan
catheters, we shipped a limited number in late 2007 and early 2008 that were later identified as having a potential leak. Although no patient is known or suspected to have experienced any consequences associated with this possible leak nor has it
significantly impacted our business, these events were reported to the FDA in accordance with applicable regulations and we subsequently initiated a voluntary recall of the affected devices. This recall was closed in June 2008. Also, following the
introduction of a new catheter in the fall of 2009, some of the new catheters experienced a leak in the flush assembly. Although no patient is known or suspected to have experienced any consequences associated with the new catheters, we voluntarily
recalled all of the catheters and reported the events to the FDA in accordance with applicable regulations. Subsequently, we returned to our prior design of the flush assembly. Any catheter redesign or other manufacturing issues may result in our
being unable to meet the expected demand for our Artisan catheters or our Sensei system, maintain control over our expenses or otherwise successfully manage our manufacturing capabilities. If we are unable to satisfy demand for our Sensei system or
Artisan catheters, our ability to generate revenue could be impaired and hospitals may instead purchase, or physicians may use, our competitors products. Since our Sensei system requires the use of disposable Artisan catheters, our failure to
meet demand for Artisan catheters from hospitals that have purchased our Sensei system could adversely affect the market acceptance of our products and damage our commercial reputation.



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In addition, all of our operations are conducted at our facilities leased in
Mountain View, California. We could encounter problems at these facilities, which could delay or prevent us from manufacturing, assembling or testing our products or maintaining our manufacturing capabilities or otherwise conducting operations.

Our reliance on third-party manufacturers and on suppliers, and in one case, a single-source supplier,
could harm our ability to meet demand for our products in a timely manner or within budget, and could cause harm to our business and financial condition.

We depend on third-party manufacturers to produce most of the components of our Sensei system and other current products,
and have not entered into formal agreements with several of these third parties. We also depend on various third-party suppliers for various components we use in our Sensei systems and for our catheters and sheaths. For example, Force Dimension
Sàrl, a single-source supplier, manufactures customized motion controllers that are a part of our Sensei system. We also obtain the motors for our Sensei system from a single supplier, Maxon Motor AG, from whom we purchase on a purchase order
basis, and we generally do not maintain large volumes of inventory. Additionally, in October 2007, we entered into a purchase agreement with Plexus Services Corp., or Plexus, under which Plexus will manufacture certain components for us in
quantities determined by a non-binding forecast and by purchase orders.

Our reliance on third parties
involves a number of risks, including, among other things, the risk that:



| |  |  | suppliers may fail to comply with regulatory requirements or make errors in manufacturing components that could negatively affect the efficacy or
safety of our products or cause delays in or prevent shipments of our products;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | we may not be able to respond to unanticipated changes and increases in customer orders;
| | - |  | ----------------------------------------------------------------------------------------



| |  |  | we may be subject to price fluctuations due to a lack of long-term supply arrangements for key components with our suppliers;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------



| |  |  | we may lose access to critical services and components, resulting in an interruption in the manufacture, assembly and shipment of our systems and
other products;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | our suppliers manufacture products for a range of customers, and fluctuations in demand for products these suppliers manufacture for others may
affect their ability to deliver components to us in a timely manner;
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | our suppliers may wish to discontinue supplying goods or services to us;
| | - |  | ------------------------------------------------------------------------



| |  |  | we may not be able to find new or alternative components for our use or reconfigure our system and manufacturing processes in a timely manner if the
components necessary for our system become unavailable; and
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | our suppliers may encounter financial hardships unrelated to our demand for components, which could inhibit their ability to fulfill our orders and
meet our requirements.
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------

If any of these risks materialize, it could significantly increase
our costs and impact our ability to meet demand for our products.

In addition, if these manufacturers or
suppliers stop providing us with the components or services necessary for the operation of our business, we may not be able to identify alternative sources in a timely fashion. Any transition to alternative manufacturers or suppliers or a decision
to discontinue our relationship with a current manufacturer or supplier could result in operational problems, increased expenses or write-down of capitalized assets that would adversely affect operating results and could delay the shipment of, or
limit our ability to provide, our products. We cannot assure you that we would be able to enter into agreements with new manufacturers or suppliers on commercially reasonable terms on a timely basis or at all. Additionally, obtaining components from
a new supplier may require qualification of a new supplier in the form of a new or supplemental filing with applicable regulatory authorities and clearance or approval of the filing before we could resume purchasing components for inclusion in our
products. Any disruptions in product supply may harm our ability to generate revenues, lead to customer dissatisfaction, damage our reputation and result in additional costs or cancellation of orders by our customers. We currently purchase a number
of the components for our Sensei system in foreign jurisdictions. Any event causing a disruption of imports, including the imposition of import restrictions, could adversely affect our business and our financial condition.



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If we fail to maintain necessary FDA clearances and CE marks for our
medical device products, or if future clearances or approvals are delayed, we will be unable to commercially distribute and market our products.

The process of seeking regulatory clearance or approval to market a medical device is expensive and time-consuming and clearance or approval is never guaranteed and, even if granted, clearance or approval
may be suspended or revoked. In May 2007, we received FDA clearance in the United States to commercialize our Sensei system and Artisan catheters only to facilitate manipulation, positioning and control, for collecting electrophysiological data
within the heart atria with electro-anatomic mapping and recording systems. Because the FDA has determined that there is a reasonable likelihood that our products could be used by physicians for uses not encompassed by the scope of the present FDA
clearance and that such uses may cause harm, we are required to label our products to state that their safety and effectiveness for use with cardiac ablation catheters in the treatment of cardiac arrhythmias including atrial fibrillation have not
been established. Accordingly, the scope of the current label may be an obstacle to our ability to successfully market and sell our products in the United States to a broader group of potential customers. We will be required to seek a separate
510(k) clearance or PMA approval to market our Sensei system for uses other than those currently cleared by the FDA. We cannot assure you that the FDA would not impose a more burdensome level of premarket review on other intended uses or
modifications to approved products. We plan to seek future approval of our Sensei system for other indications, including atrial fibrillation and other cardiac ablation procedures. We have received IDE approval to investigate the use of our Artisan
catheter in the treatment of atrial fibrillation in a clinical study designed to support the expansion of our current labeling in the U.S. beyond mapping. The study will involve approximately 300 patients and involves the treatment of atrial
fibrillation. We enrolled our first patient in May 2010, although we may modify the timing of planned enrollment in the future to minimize expenditures. The study will include a seven-day follow-up for safety and a one-year follow-up for efficacy at
intervals of 90, 180, and 365 days. We cannot assure the timing or potential for success of those efforts if undertaken. The FDA can delay, limit or deny clearance of a 510(k), or PMA approval, for many reasons, including:



| |  |  | our inability to demonstrate safety or effectiveness to the FDAs satisfaction;
| | - |  | -------------------------------------------------------------------------------



| |  |  | the data from our preclinical studies and clinical trials may be insufficient to support approval;
| | - |  | --------------------------------------------------------------------------------------------------



| |  |  | the facilities of our third-party manufacturers or suppliers may not meet applicable requirements;
| | - |  | --------------------------------------------------------------------------------------------------



| |  |  | our compliance with preclinical, clinical or other regulations;
| | - |  | ---------------------------------------------------------------



| |  |  | our inability to meet the FDAs statistical requirements or changes in statistical tests or significance levels the FDA requires for approval
of a medical device, including ours; and
| | - |  | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | changes in the FDA approval policies, expectations with regard to the type or amount of scientific data required or adoption of new regulations may
require additional data or additional clinical studies.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

Furthermore, in order to market our
Sensei system outside of the United States, we will need to establish and comply with the numerous and varying regulatory requirements of other countries regarding safety and efficacy. We received the CE Mark in Europe for our Sensei system in
September 2006, for our Artisan catheters in May 2007 and for our Lynx catheters in September 2010, but we may be required to seek separate clearances from the European Union in order to market our Sensei system for any additional uses. Such
approval may be difficult and costly to achieve, or may not be granted at all. If we are unable to maintain our regulatory clearances and obtain future clearances for our Sensei system and other products, our financial condition and cash flow may be
adversely affected, and our ability to grow domestically and internationally may be limited.



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If physicians and hospitals do not believe that our Sensei system and
catheters are a safe and effective alternative to existing technologies used in atrial fibrillation and other cardiac ablation procedures, they may choose not to use our Sensei system.

We believe that physicians will not use, and hospitals will not purchase, our Sensei system and catheters unless they
determine that our Sensei system provides a safe and effective alternative to existing treatments. Since we have received FDA clearance to market our Sensei system and disposable Artisan catheters only for guiding catheters to map the heart anatomy,
we will not be able to label or promote these products, or train physicians, for use in guiding catheters for cardiac ablation until such clearance or approval is obtained. Currently, there is only limited clinical data on our Sensei system with
which to assess its safety and efficacy in any procedure, including atrial fibrillation and other cardiac ablation procedures. A number of recent studies have been published on the efficacy, safety and efficiency of our products, especially by
comparison to manual techniques. While we believe many of those studies have validated our assessment of the benefits of our products, some of these studies have been cited by our competitors to portray our products in an unfavorable light. A number
of additional studies are underway both in the United States and Europe assessing early clinical experience with our products and continuing to compare usability and success of treatment between procedures performed with our Sensei system and manual
technique. If these studies, or other clinical studies performed by us or others, or clinical experience indicate that procedures with our Sensei system or the type of procedures that can be performed with the Sensei system are not effective or safe
for such uses, physicians may choose not to use our Sensei system. For example, one study reported a statistically insignificant higher rate of major complications for patients treated with our system than those treated manually and one patient in
the robotic arm of the study died. This study or other studies may create a perception that our system is not as effective and safe as manual technique. Reluctance by physicians to use our Sensei system or to perform procedures enable by the Sensei
system would harm sales. Furthermore, we plan to develop a robotic system for the treatment of vascular diseases, and there is no clinical data for the proposed systems safety and efficacy. Reluctance by physicians to use our Sensei system or to
perform procedures enabled by the Sensei system would harm sales. Further, unsatisfactory patient outcomes or patient injury could cause negative publicity for our products, particularly in the early phases of product introduction. In addition,
physicians may be slow to adopt our products if they perceive liability risks arising from the use of these new products. It is also possible that as our products become more widely used, latent or other defects could be identified, creating
negative publicity and liability problems for us, thereby adversely affecting demand for our products. If physicians do not use our products in cardiac ablation procedures, we likely will not become profitable on a sustained basis and our business
will be harmed.

In addition, our research and development efforts and our marketing strategy depend heavily
on obtaining support and collaboration from highly regarded physicians at leading hospitals. If we are unable to gain or maintain such support and collaboration, our ability to market our Sensei system and, as a result, our business and results of
operations, could be harmed.

Until other products are developed and receive regulatory approval, we
expect to derive substantially all of our revenues from sales of our Sensei system and our catheters. If hospitals do not purchase our system, we may not generate sufficient revenues to continue our operations.

Our initial commercial offering consists primarily of two products, our Sensei system and our corresponding disposable
Artisan catheters. The Sensei system has been supplemented by an optional CoHesion Module and, in the third quarter of 2010, we introduced our Lynx catheter in Europe. In order for us to achieve sales, hospitals must purchase our Sensei system and
Artisan and Lynx catheters. Our Sensei system is a novel device, and hospitals are traditionally slow to adopt new products and treatment practices. In addition, our Sensei system is an expensive capital equipment purchase, representing a
significant portion of an electrophysiology laboratorys annual budget. In addition, because it has only recently been commercially introduced, our Sensei system has limited product and brand recognition. Furthermore, particularly in this
period of economic volatility and uncertainty, we do not believe hospitals will purchase our products unless the physicians at those hospitals express a strong desire to use our products and we cannot predict whether or not they will do so. If
hospitals do not widely adopt our Sensei system, or if they decide that it is too expensive, we may never achieve significant revenue or become profitable. Such a failure to adequately sell our Sensei system would have a materially detrimental
impact on our business, results of operations and financial condition.



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We have incurred substantial losses since inception and anticipate
that we will incur continued losses through at least the next year, we may not be able to raise additional financing to fund future losses and we may not be able to continue to operate as a going concern.

We have experienced substantial net losses since our inception in late 2002. As of March 31, 2011, we had an
accumulated deficit of $246.4 million. We have funded our operations to date principally from the sale of our securities and through issuance of debt. In 2008, we both issued equity and entered into a new debt facility and, in 2009 and 2010, we
issued additional equity; however, we may at any time sell additional securities resulting in further dilution to existing stockholders and we may at any time incur additional indebtedness. The recent turmoil in the global financial and credit
markets may limit our ability to raise additional funds. We cannot guarantee that future equity or debt financing will be available in amounts or on terms acceptable to us, if at all. Further, even if financing becomes available, the cost to us may
be significantly higher than in the past. We will continue to face significant challenges if conditions in the financial markets do not improve or continue to worsen. In particular, our ability to access the capital markets and raise funds required
for our operations may be severely restricted at a time when we would like, or need, to do so, which could have an adverse effect on our ability to meet our current and future funding requirements and on our flexibility to react to changing economic
and business conditions. This could leave us without adequate financial resources to fund our operations as presently conducted or as we plan to conduct them in the future.

We expect to incur substantial additional net losses for at least the next year as we continue our development efforts
towards a Vascular System, continue our manufacturing, marketing and sales operations to commercialize our products and seek additional regulatory clearances. We expect our research and development expenses and selling, general and administrative
expenses to remain essentially consistent in 2011 as compared to 2010 levels as we continue our product engineering efforts related to our vascular platform, develop our intellectual property portfolio, maintain the infrastructure necessary to
support operating as a public company and incur other legal expenses, including litigation expenses. Because we may not be successful in significantly increasing sales of our products, the extent of our future losses and the timing of achieving
sustained profitability are highly uncertain, and we may never achieve sustained profitable operations. If we require more time than we expect to generate significant revenue and achieve sustained profitability, we may not be able to continue our
operations. Even if we achieve significant revenues, we may never become profitable on a sustained basis or we may choose to pursue a strategy of increasing market penetration and presence at the expense of profitability.

We may incur significant liability if it is determined that we are promoting off-label use of our products in
violation of federal and state regulations in the United States or elsewhere.

We have received FDA
clearance of our Sensei system and Artisan catheters only to facilitate manipulation, positioning and control for collecting electrophysiological data within the heart atria with electro-anatomic mapping and recording systems, which is a critical
step in the identification of the heart tissue generating abnormal heart rhythms that may require ablation or other treatment. Because the FDA has determined that there is a reasonable likelihood that physicians may choose to use our products
off-label, and that harm may result, we are required to label our products to state that their safety and effectiveness for use with cardiac ablation catheters in the treatment of cardiac arrhythmias including atrial fibrillation have not been
established. We have proposed a clinical trial to the FDA for the use of our Artisan catheter in the treatment of atrial fibrillation as part of our process to expand our current labeling in the U.S. beyond mapping. Thus, efforts are underway to
eventually seek regulatory clearance for the use of our Sensei system in atrial fibrillation procedures. We may subsequently seek regulatory clearance for use of our Sensei system for use with other catheters. Our business and future growth will
depend primarily on the use of our Sensei system in the treatment of atrial fibrillation and other cardiovascular procedures, for which we do not yet, and may never, have FDA clearance or approval.



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Unless and until we receive regulatory clearance or approval for use of our
Sensei system with ablation catheters or in these procedures, uses in these procedures will be considered off-label uses of our Sensei system. Under the Federal Food, Drug, and Cosmetic Act and other similar laws, we are prohibited from labeling or
promoting our products, or training physicians, for such off-label uses. This prohibition means that the FDA could deem it unlawful for us to make claims about the safety or effectiveness of our Sensei system for use with ablation catheters and in
cardiac ablation procedures and that we may not proactively discuss or provide information or training on the use of our product in cardiac ablation procedures or use with unapproved catheters, with very limited exceptions. We presently believe that
to date, all of the procedures in which our products have been used in the United States have included off-label uses such as cardiac ablation, for which our Sensei system and Artisan catheters have not been cleared by the FDA.

The FDA and other regulatory agencies actively enforce regulations prohibiting promotion of off-label uses and the
promotion of products for which marketing clearance or approval has not been obtained. Moreover, scrutiny of such practices by the FDA and other federal agencies has recently increased. Promotional activities for FDA regulated products of other
companies have been the subject of enforcement action brought under healthcare reimbursement laws and consumer protection statutes. A company that is found to have improperly promoted off-label uses may be subject to significant liability, including
civil and administrative remedies under the Federal False Claims Act and various other federal and state laws, as well as criminal sanctions.

Due to these legal constraints, our sales and marketing efforts focus on the general technical attributes and benefits of our Sensei system and the use of this device to guide two specific catheters for
heart mapping. If we are perceived not to be in compliance with all of the restrictions limiting the promotion of our products for off-label use, we could be subject to various enforcement measures, including investigations, administrative
proceedings and federal and state court litigation, which would likely be costly to defend and harmful to our business. If the FDA or another governmental authority ultimately concludes we are not in compliance with such restrictions, we could be
subject to significant liability, including civil and administrative remedies, injunctions against sales for off-label uses, significant monetary and punitive penalties and criminal sanctions, any or all of which would be harmful to our business and
in certain instances may cause us to have to cease operations.

The training required for physicians to
use our Sensei system could reduce the market acceptance of our system and reduce our revenue.

It is
critical to the success of our sales efforts to ensure that there are a sufficient number of physicians familiar with, trained on and proficient in the use of our Sensei system. Convincing physicians to dedicate the time and energy necessary for
adequate training in the use of our system is challenging, and we cannot assure you that we will be successful in these efforts.

It is our policy to only train physicians to insert, navigate, map and remove catheters using our Sensei system. Physicians must obtain training elsewhere to learn how to ablate cardiac tissue to treat
atrial fibrillation, which is an off-label procedure. This training may be provided by third parties, such as hospitals and universities and through independent peer-to-peer training among doctors. We cannot assure you that a sufficient number of
physicians will become aware of training programs or that physicians will dedicate the time, funds and energy necessary for adequate training in the use of our system. Additionally, we will have no control over the quality of these training
programs. If physicians are not properly trained, they may misuse or ineffectively use our products. This may result in unsatisfactory outcomes, patient injury, negative publicity or lawsuits against us, any of which could negatively affect our
reputation and sales of our products. Furthermore, our inability to educate and train physicians to use our Sensei system for atrial fibrillation or other cardiac ablation procedures may lead to inadequate demand for our products and have a material
adverse impact on our business, financial condition and results of operation.



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Training in the use of our products is regulated by the FDA. Our physician
training and the training provided by third parties typically includes facilitating an observation of a Sensei case by the trainee physician. We monitor our training to ensure that off-label use is not promoted or enabled. However, from time to
time, we may sponsor third party training. There is a risk that independent peer-to-peer interaction between physicians and other third party training may include discussion or observation of off-label procedures because most procedures performed to
date using the Sensei system involve both mapping and cardiac ablation. If any such activities are attributed to us, the FDA or other governmental entities could conclude that we have engaged in off-label promotion of our products, which could
subject us to significant liability.

Because our markets are highly competitive, customers may choose
to purchase our competitors products, which would result in reduced revenue and harm our financial results.

Our Sensei system is still considered a new technology and must compete with established manual interventional methods and methods of our competitors, such as Stereotaxis, Inc., in remote navigation.
Conventional manual methods are widely accepted in the medical community, have a long history of use and do not require the purchase of additional, expensive capital equipment. The Stereotaxis Niobe® system, which has been in the market since 2003, four years earlier than our Sensei system, has been adopted by a number of leading clinicians. In addition, many of
the medical conditions that can be treated using our products can also be treated with existing drugs or other medical devices and procedures. Many of these alternative treatments are widely accepted in the medical community and have a long history
of use.

We also face competition from companies that are developing drugs or other medical devices or
procedures to treat the conditions for which our products are intended. The medical device and pharmaceutical industries make significant investments in research and development and innovation is rapid and continuous. If new products or technologies
emerge that provide the same or superior benefits as our products at equal or lesser cost, they could render our products obsolete or unmarketable. We cannot be certain that physicians will use our products to replace or supplement established
treatments or that our products will be competitive with current or future products and technologies.

Most of
our competitors enjoy several competitive advantages over us, including:



| |  |  | significantly greater name recognition;
| | - |  | ---------------------------------------



| |  |  | longer operating histories;
| | - |  | ---------------------------



| |  |  | established relations with healthcare professionals, customers and third-party payors;
| | - |  | --------------------------------------------------------------------------------------



| |  |  | established distribution networks;
| | - |  | ----------------------------------



| |  |  | additional lines of products, and the ability to offer rebates or bundle products to offer higher discounts or incentives to gain a competitive
advantage;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | greater experience in conducting research and development, manufacturing, clinical trials, obtaining regulatory clearance for products and marketing
approved products; and
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | greater financial and human resources for product development, sales and marketing, and patent litigation.
| | - |  | ----------------------------------------------------------------------------------------------------------

In addition, as the markets for medical devices develop, additional competitors could enter the market. As a result, we
cannot assure you that we will be able to compete successfully against existing or new competitors. Our revenues would be reduced or eliminated if our competitors develop and market products that are more effective and less expensive than our
products.



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We expect to continue to experience extended and variable sales
cycles, which could cause significant variability in our results of operations for any given quarter.

Our Sensei system has a lengthy sales cycle because it involves a relatively expensive capital equipment purchase, which
generally requires the approval of senior management at hospitals, inclusion in the hospitals electrophysiology laboratory budget process for capital expenditures and, in some instances, a certificate of need from the state or other regulatory
clearance. We continue to estimate that this sales cycle may take between six and 18 months. Beginning with the fourth quarter of 2008 and continuing through 2010, in a period of economic uncertainty, we have seen sales cycles for many potential
customers lengthen and purchase decisions postponed. Additionally, the majority of our revenue is shipped in the last weeks of a given quarter. Any disruption in our supply chain during those critical weeks or an inability to fulfill our
deliverables during that compressed time frame could significantly impact the timing of our ability to recognize revenue on those items. These factors have contributed in the past and may contribute in the future to substantial fluctuations in our
quarterly operating results, particularly in the near term and during any other periods in which our sales volume is relatively low. As a result, in future quarters our operating results could differ from our announcements of guidance regarding
future operating or financial results or may fail to meet the expectations of securities analysts or investors, in which event our stock price would likely decrease. These fluctuations also mean that you will not be able to rely upon our operating
results in any particular period as an indication of future performance. In addition, the introduction of new products could adversely impact our sales cycle, as customers take additional time to assess the benefits and investments on capital
products.

The use of our products could result in product liability claims that could be expensive,
divert managements attention and harm our reputation and business.

Our business exposes us to
significant risks of product liability claims that are inherent in the testing, manufacturing and marketing of medical devices. Moreover, the FDA has expressed concerns regarding the safety and efficacy of our Sensei system for ablation and other
therapeutic indications, including for the treatment of atrial fibrillation and has specifically instructed that our products be labeled to inform our customers that the safety and effectiveness of our technology for use with cardiac ablation
catheters in the treatment of cardiac arrhythmias, including for atrial fibrillation, have not been established. We presently believe that to date, all of the procedures in which our products have been used in the United States have included
off-label uses such as cardiac ablation, for which our Sensei system and Artisan catheters have not been cleared by the FDA and which therefore could increase the risk of product liability claims. The medical device industry has historically been
subject to extensive litigation over product liability claims. We may be subject to claims by consumers, healthcare providers, third-party payors or others selling our products if the use of our products were to cause, or merely appear to cause,
injury or death. Any weakness in training and services associated with our products may also result in product liability lawsuits. Although we maintain clinical trial liability and product liability insurance, the coverage is subject to deductibles
and limitations, and may not be adequate to cover future claims. Additionally, we may be unable to maintain our existing product liability insurance in the future at satisfactory rates or adequate amounts. A product liability claim, regardless of
its merit or eventual outcome could result in:



| |  |  | decreased demand for our products;
| | - |  | ----------------------------------



| |  |  | injury to our reputation;
| | - |  | -------------------------



| |  |  | diversion of managements attention;
| | - |  | ------------------------------------



| |  |  | withdrawal of clinical trial participants;
| | - |  | ------------------------------------------



| |  |  | significant costs of related litigation;
| | - |  | ----------------------------------------



| |  |  | payment of substantial monetary awards to patients;
| | - |  | ---------------------------------------------------



| |  |  | product recalls or market withdrawals;
| | - |  | --------------------------------------



| |  |  | loss of revenue; and
| | - |  | --------------------



| |  |  | the inability to commercialize our products under development.
| | - |  | --------------------------------------------------------------



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We may be unable to complete the development and commercialization of
our existing and anticipated products without additional funding.

Our operations have consumed
substantial amounts of cash since inception. We expect to continue to spend substantial amounts on research and development. We expect to spend significant additional amounts on the continuing commercialization of our products and the development
and introduction of new products. In particular, we have recently begun development of a new robotic system to be used in endovascular applications. We expect to spend considerable amount in the development of this device and in obtaining regulatory
approval. In the quarter ended March 31, 2011, net cash used in operating activities was $6.5 million, which included $6.0 million received from Philips associated with the amendment of the joint development agreement. We expect that our
cash used in operations will be significant in each of the next several years, and we will need additional funds to continue the commercialization of our Sensei system and the development of our Vascular System.

Additional financing may not be available on a timely basis on terms acceptable to us, or at all. Furthermore, even if
financing becomes available, the cost to us may be significantly higher than in the past. Any additional financing may be dilutive to stockholders or may require us to grant a lender a security interest in our intellectual property assets. The
amount of funding we will need will depend on many factors, including:



| |  |  | the success of our research and product development efforts;
| | - |  | ------------------------------------------------------------



| |  |  | the expenses we incur in selling and marketing our products;
| | - |  | ------------------------------------------------------------



| |  |  | the costs and timing of future regulatory clearances;
| | - |  | -----------------------------------------------------



| |  |  | the revenue generated by sales of our current and future products;
| | - |  | ------------------------------------------------------------------



| |  |  | the gross margins generated by our revenues and cost of sales;
| | - |  | --------------------------------------------------------------



| |  |  | the rate of progress and cost of our clinical trials and other development activities;
| | - |  | --------------------------------------------------------------------------------------



| |  |  | the emergence of competing or complementary technological developments;
| | - |  | -----------------------------------------------------------------------



| |  |  | the cost of legal fees relating to shareholder lawsuits;
| | - |  | --------------------------------------------------------



| |  |  | the costs of filing, prosecuting, defending and enforcing any patent claims and other intellectual property rights, or participating in
litigation-related activities;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the terms and timing of any collaborative, licensing or other arrangements that we may establish; and
| | - |  | -----------------------------------------------------------------------------------------------------



| |  |  | the acquisition of businesses, products and technologies.
| | - |  | ---------------------------------------------------------

If adequate funds are not available, we may have to delay development or commercialization of our products or license to
third parties the rights to commercialize products or technologies that we would otherwise seek to commercialize. We also may have to reduce marketing, customer support or other resources devoted to our products. Any of these factors could harm our
financial condition.

Our products and related technologies can be applied in different applications,
and we may fail to focus on the most profitable areas or we may be unable to address successfully financial and technology risks associated with new applications, including applications for the vascular market.

Our Sensei system is designed to have the potential for applications beyond electrophysiology, including in a variety of
endovascular procedures which require a control catheter to approach diseased tissue. We further believe that our Sensei system can provide multiple opportunities to improve the speed and capability of many diagnostic and therapeutic procedures. We
will be required to seek a separate 510(k) clearance or PMA approval from the FDA for these applications of our Sensei system. However, we have limited financial and managerial resources and therefore may be required to focus on products in selected
applications and to forego efforts with regard to other products and industries including expansion of our electrophysiology applications as well as the development of non-electrophysiology applications.



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We are dedicating significant resources to the development of a product for
vascular applications. Such development efforts may not be successful, may not achieve regulatory approval, may not produce viable commercial products and may divert our limited resources from more profitable market opportunities. Moreover, we may
devote resources to developing products in additional areas but may be unable to justify the value proposition or otherwise develop a commercial market for products we develop in these areas, if any. In that case, the return on investment in these
additional areas may be limited, which could negatively affect our results of operations.

If we fail to
maintain collaborative relationships with providers of imaging and visualization technology on terms favorable to us, or at all, our Sensei system may not be able to gain market acceptance and our business may be harmed.

Our success depends on our ability to continually enhance and broaden our product offerings in response to changing
technologies, customer demands and competitive pressures. We believe that integrating our Sensei system with key imaging and visualization technologies using an open architecture approach is a key element in establishing our Sensei system as
important for complex interventional procedures. Our Sensei system currently utilizes a variety of imaging means to visualize and assist in navigating our catheters. These imaging systems include fluoroscopy, intravascular ultrasound and
electro-anatomic mapping systems, as well as pre-operatively acquired three-dimensional computed tomography and magnetic resonance imaging. We believe that in the future, as imaging companies develop increasingly sophisticated three-dimensional
imaging systems, we will need to integrate advanced imaging into our Sensei system in order to compete effectively. There can be no assurance that we can timely and effectively integrate these systems or components into our Sensei system in order to
remain competitive. We expect to face competition from companies that are developing new approaches and products for use in interventional procedures and that have an established presence in the field of interventional cardiology, including the
major imaging, capital equipment and disposables companies that are currently selling products in the electrophysiology laboratory. We may not be able to acquire or develop three-dimensional imaging and visualization technology for use with our
Sensei system. In addition, developing or acquiring key imaging and visualization technologies could be expensive and time-consuming and may not integrate well with our Sensei system. If we are unable to timely acquire, develop or integrate imaging
and visualization technologies, or any other changing technologies, effectively, our revenue may decline and our business will suffer.

In April 2007, we entered into agreements with St. Jude Medical, Inc., or St. Jude, to integrate our Sensei system with St. Judes Ensite system and to co-market the integrated product. We are not
obligated to undertake any other development projects except for the integration of the Sensei system with the EnSite system. We are solely responsible for gaining regulatory approvals for, and all costs associated with, our portion of the
integrated products developed under the arrangement. At the end of the second quarter of 2008, the FDA cleared for marketing in the United States our CoHesion Module, which provides an interface between our Sensei system and the EnSite system;
however, there can be no assurance that we will successfully maintain necessary regulatory clearances or that we and St. Jude will maintain compatibility of our products under the collaboration or that the CoHesion Module will gain market
acceptance.

In addition, under the terms of the co-marketing agreement, we granted St. Jude the exclusive
right to distribute products developed under the joint development agreement when ordered with St. Jude products worldwide, excluding certain specified countries, for the diagnosis and/or treatment of certain cardiac conditions. There can be no
assurance that we will successfully collaborate or that St. Jude will generate significant sales under this arrangement. If we are not able to successfully collaborate with St. Jude or are unable to successfully integrate our systems, we may not be
able to effectively compete with new technologies and our business may be harmed.



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Future acquisitions could disrupt our business and harm our financial
condition and operating results.

Our success will depend, in part, on our ability to expand our
offerings and markets and grow our business in response to changing technologies, customer demands and competitive pressures. In some circumstances, we may determine to do so through the acquisition of complementary businesses, solutions or
technologies rather than through internal development. The identification of suitable acquisition candidates can be difficult, time-consuming and costly, and we may not be able to successfully complete identified acquisitions. Furthermore, even if
we successfully complete an acquisition, we may not be able to successfully assimilate and integrate the business, technologies, solutions, personnel or operations of the company that we acquired, particularly if key personnel of an acquired company
decide not to work for us. In addition, we may issue equity securities to complete an acquisition, which would dilute our stockholders ownership and could adversely affect the price of our common stock. Acquisitions may also involve the entry
into geographic or business markets in which we have little or no prior experience. Consequently, we may not achieve anticipated benefits of the acquisitions which could harm our operating results.

Software defects may be discovered in our products.

Our Sensei system incorporates sophisticated computer software. Complex software frequently contains errors, especially
when first introduced. Because our products are designed to be used to perform complex interventional procedures, we expect that physicians and hospitals will have an increased sensitivity to the potential for software and other defects. We cannot
assure you that our software will not experience errors or performance problems in the future. If we experience software errors or performance problems, we would likely also experience:



| |  |  | loss of revenue;
| | - |  | ----------------



| |  |  | an increase in reportable adverse events to applicable authorities such as the FDA;
| | - |  | -----------------------------------------------------------------------------------



| |  |  | delay in market acceptance of our products;
| | - |  | -------------------------------------------



| |  |  | damage to our reputation;
| | - |  | -------------------------



| |  |  | additional regulatory filings;
| | - |  | ------------------------------



| |  |  | product recalls;
| | - |  | ----------------



| |  |  | increased service or warranty costs; and/or
| | - |  | -------------------------------------------



| |  |  | product liability claims relating to the software defects.
| | - |  | ----------------------------------------------------------

Our costs could substantially increase if we receive a significant number of service claims.

We typically provide post-contract customer service for each of our products against defects in materials and workmanship
for a period of approximately 12 months from the delivery or acceptance of our product by a customer which is normally when the system is installed. The associated expenses are charged to cost of revenues as incurred. We have a very limited history
of commercial placements from which to judge our rate of claims against our service contracts. Our obligation under these service contracts may be impacted by product failure rates, material usage and service costs. Unforeseen exposure under these
post-contract customer service contracts could negatively impact our business, financial condition and results of operations.

Hospitals or physicians may be unable to obtain coverage or reimbursement from third-party payors for procedures using our Sensei system, which could affect the adoption or use of our Sensei system
and may cause our revenues to decline.

We anticipate that third-party payors will continue to
reimburse hospitals and physicians under existing billing codes for the vast majority of the procedures involving our products. We expect that healthcare facilities and physicians in the United States will continue to bill various third-party
payors, such as Medicare, Medicaid, other governmental programs and private insurers, for services performed using our products. We believe that procedures targeted for use with our products are generally already reimbursable under government
programs and most private plans. Accordingly, we believe providers in the United States will generally not be required to obtain new billing authorizations or codes in order to be compensated for performing medically necessary procedures using our
products on insured patients.



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There can be no assurance, however, that coverage, coding and reimbursement
policies of third-party payors will not change in the future with respect to some or all of the procedures that would use our Sensei system. Additionally, in the event that a physician uses our Sensei system for indications not approved by the FDA,
there can be no assurance that the coverage or reimbursement policies of third-party payors will be comparable to FDA-approved uses. Future legislation, regulation or coverage, coding and reimbursement policies of third-party payors may adversely
affect the demand for our products currently under development and limit our ability to profitably sell our products. For example, under recent regulatory changes to the methodology for calculating payments for current inpatient procedures in
certain hospitals, Medicare payment rates for surgical and cardiac procedures have been decreased, including those procedures for which our products are targeted. The majority of the procedures performed with our Sensei system and Artisan catheter
are done on an in-patient basis and thus are paid under the Medicare-severity diagnosis related group, or MS-DRG system. We believe that the majority of procedures performed using our technology fall under MS-DRG 251, percutaneous cardiovascular
procedures without coronary artery stent or acute myocardial infarction without major cardiovascular complication, with an average reimbursement of $9,260 for fiscal 2008. The Centers for Medicare & Medicaid Services update the MSDRG
payment rates annually effective October 1 through September 30 of the following year. Because hospital inpatient reimbursement is largely dependent on geographical location and other hospital-specific factors, an individual
hospitals revenues from ablation procedures to treat atrial fibrillation using our technology can vary significantly. At this time, we cannot predict the full impact any rate reductions will have on our future revenues or business.

Our success in international markets also depends upon the eligibility of our products for coverage and reimbursement by
government-sponsored healthcare payment systems and third-party payors. Recent legislative proposals in the United States to reform healthcare and government insurance programs have included a focus on healthcare costs which could limit the coverage
and reimbursement for procedures utilizing our products. In both the United States and foreign markets, healthcare cost-containment efforts are prevalent and are expected to continue and may increase. The failure of our customers to obtain
sufficient reimbursement could have a material adverse impact on our financial condition and harm our business.

We have incurred substantial management and employee turnover and we may lose additional key personnel or fail to
attract and retain additional personnel needed for us to operate our business effectively.

We
currently have an interim Chief Financial Officer and are actively conducting a search for a Chief Financial Officer. In January 2011, our Vice President of U.S. Commercial Operations resigned and in October 2010 our Senior Vice President of
Operations resigned. Additionally, our former Vice President of Engineering and former Chief Technology Officer ended their post-employment consulting services with us in September 2010. If we are unable to recruit qualified individuals in a timely
manner, our product development and commercialization efforts could be materially delayed or be unsuccessful. Additionally, in the third quarter of 2008 and the first and third quarters of 2009, we reduced our work force and we may undertake
additional actions to reduce our work force in the future. These reductions in force may make it more difficult to retain and attract the qualified personnel required, placing a significant strain on our management. Accordingly, retaining such
personnel and recruiting necessary new employees in the future will be critical to our success. There is intense competition from other companies and research and academic institutions for qualified personnel in the areas of our activities. If we
fail to identify, attract, retain and motivate these highly skilled management and personnel, we may be unable to continue our development and commercialization activities and our business will be harmed.

We are highly dependent on the principal members of our management and scientific staff. We do not carry key
person insurance covering any members of our senior management. Each of our officers and key employees may terminate his employment at any time without notice and without cause or good reason. The loss of any of these persons could prevent the
implementation and completion of our objectives, including the development and introduction of our products, and could require the remaining management members to direct immediate and substantial attention to seeking a replacement.



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If we do not effectively manage our growth, we may be unable to
successfully develop, market and sell our products.

Our future revenue and operating results will
depend on our ability to manage the possible future growth of our business. We have experienced significant growth in the scope of our operations since our inception. This growth has placed significant demands on our management, as well as our
financial and operations resources. In order to achieve our business objectives, however, we will need to continue to grow, which presents numerous challenges, including:



| |  |  | implementing appropriate operational and financial systems and controls;
| | - |  | ------------------------------------------------------------------------



| |  |  | expanding manufacturing capacity, increasing production and improving margins;
| | - |  | ------------------------------------------------------------------------------



| |  |  | developing our sales and marketing infrastructure and capabilities;
| | - |  | -------------------------------------------------------------------



| |  |  | identifying, attracting and retaining qualified personnel in our areas of activity; and
| | - |  | ---------------------------------------------------------------------------------------



| |  |  | training, managing and supervising our personnel worldwide.
| | - |  | -----------------------------------------------------------

Any failure to effectively manage our growth could impede our ability to successfully develop, market and sell our
products and our business will be harmed.

We commenced sales of our Sensei system internationally and
are subject to various risks relating to such international activities which could adversely affect our international sales and operating performance.

A portion of our current and future revenues will come from international sales. To expand internationally, we will need to hire, train and retain additional qualified personnel. Engaging in international
business inherently involves a number of difficulties and risks, including:



| |  |  | required compliance with existing and changing foreign regulatory requirements and laws;
| | - |  | ----------------------------------------------------------------------------------------



| |  |  | export or import restrictions and controls relating to technology;
| | - |  | ------------------------------------------------------------------



| |  |  | pricing pressure;
| | - |  | -----------------



| |  |  | laws and business practices favoring local companies;
| | - |  | -----------------------------------------------------



| |  |  | longer payment cycles;
| | - |  | ----------------------



| |  |  | the effects of fluctuations in foreign currency exchange rates;
| | - |  | ---------------------------------------------------------------



| |  |  | shipping delays;
| | - |  | ----------------



| |  |  | difficulties in enforcing agreements and collecting receivables through certain foreign legal systems;
| | - |  | ------------------------------------------------------------------------------------------------------



| |  |  | political and economic instability;
| | - |  | -----------------------------------



| |  |  | potentially adverse tax consequences, tariffs and other trade barriers;
| | - |  | -----------------------------------------------------------------------



| |  |  | international terrorism and anti-American sentiment;
| | - |  | ----------------------------------------------------



| |  |  | difficulties in penetrating markets in which our competitors products are more established;
| | - |  | --------------------------------------------------------------------------------------------



| |  |  | difficulties and costs of staffing and managing foreign operations; and
| | - |  | -----------------------------------------------------------------------



| |  |  | difficulties in enforcing intellectual property rights.
| | - |  | -------------------------------------------------------

If one or more of these risks are realized, it could require us to dedicate significant resources to remedy the
situation, and if we are unsuccessful at finding a solution, our revenue may decline.



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Our business may be harmed by a natural disaster, terrorist attacks or
other unanticipated problems.

Our manufacturing and office facilities are located in Mountain View,
California. Despite precautions taken by us, a natural disaster such as fire or earthquake, a terrorist attack or other unanticipated problems at our facilities could interrupt our ability to manufacture our products or operate our business. These
disasters or problems may also destroy our product inventories. While we carry insurance for certain natural disasters and business interruption, any prolonged or repeated disruption or inability to manufacture our products or operate our business
could result in losses that exceed the amount of coverage provided by this insurance, and in such event could harm our business.

We may be liable for contamination or other harm caused by materials that we handle, and changes in environmental regulations could cause us to incur additional expense.

Our research and development, manufacturing and clinical processes involve the handling of potentially harmful biological
materials as well as other hazardous materials. We are subject to federal, state and local laws and regulations governing the use, handling, storage and disposal of hazardous and biological materials and we incur expenses relating to compliance with
these laws and regulations. If violations of environmental, health and safety laws occur, we could be held liable for damages, penalties and costs of remedial actions. These expenses or this liability could have a significant negative impact on our
financial condition. We may violate environmental, health and safety laws in the future as a result of human error, equipment failure or other causes. Environmental laws could become more stringent over time, imposing greater compliance costs and
increasing risks and penalties associated with violations. We are subject to potentially conflicting and changing regulatory agendas of political, business and environmental groups. Changes to or restrictions on permitting requirements or processes,
hazardous or biological material storage or handling might require an unplanned capital investment or relocation. Failure to comply with new or existing laws or regulations could harm our business, financial condition and results of operations.

Changes to existing accounting pronouncements or taxation rules or practices may affect how we conduct
our business and affect our reported results of operations.

Significant new accounting pronouncements
and taxation rules or practices and updated interpretations of existing accounting pronouncements and taxation rules or practices have occurred in the past and may occur in the future. A change in accounting pronouncements or taxation rules or
practices can have a significant effect on our reported results and may even affect our reporting of transactions completed before the change is effective. In addition, a review of existing or prior accounting practices may result in a change in
previously reported amounts. For example, the FASB has recently issued new accounting principles around revenue recognition and the SEC is considering adoption of international financial reporting standards. These changes to existing rules, future
changes, if any, or the questioning of current practices may adversely affect our reported financial results or the way we conduct our business.

Risks Related to Our Intellectual Property

If we
are unable to protect the intellectual property contained in our products from use by third parties, our ability to compete in the market will be harmed.

Our commercial success will depend in part on obtaining patent and other intellectual property protection for the
technologies contained in our products, and on successfully defending our patents and other intellectual property against third party challenges. We expect to incur substantial costs in obtaining patents and, if necessary, defending our proprietary
rights. The patent positions of medical device companies, including ours, can be highly uncertain and involve complex and evolving legal and factual questions. We do not know whether we will be able to obtain the patent protection we seek, or
whether the protection we do obtain will be found valid and enforceable if challenged. We also do not know whether we will be able to develop additional patentable proprietary technologies. If we fail to obtain adequate protection of our
intellectual property, or if any protection we obtain is reduced or eliminated, others could use our intellectual property without compensating us, resulting in harm to our business. We may also determine that it is in our best interests to
voluntarily challenge a third partys products or patents in litigation or administrative proceedings, including patent interferences or reexaminations. In the event that we seek to enforce any of our owned or exclusively licensed patents
against an infringing party, it is likely that the party defending the claim will seek to invalidate the patents we assert, which, if successful could result in the loss of the entire patent or the relevant portion of our patent, which would not be
limited to any particular party. Any litigation to enforce or defend our patent rights, even if we were to prevail, could be costly and time-consuming and could divert the attention of our management and key personnel from our business operations.
Our competitors may independently develop similar or alternative technologies or products without infringing any of our patent or other intellectual property rights, or may design around our proprietary technologies.



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We cannot assure you that we will obtain the patent protection we seek, that
any protection we do obtain will be found valid and enforceable if challenged or that such patent protection will confer any significant commercial advantage. United States patents and patent applications may also be subject to interference
proceedings and United States patents may be subject to reexamination proceedings in the United States Patent and Trademark Office, and foreign patents may be subject to opposition or comparable proceedings in the corresponding foreign patent
offices, which proceedings could result in either loss of the patent or denial of the patent application, or loss or reduction in the scope of one or more of the claims of, the patent or patent application. In addition, such interference,
reexamination and opposition proceedings may be costly. Some of our technology was, and continues to be, developed in conjunction with third parties, and thus there is a risk that such third parties may claim rights in our intellectual property.
Thus, any patents that we own or license from others may provide limited or no protection against competitors. Our pending patent applications, those we may file in the future, or those we may license from third parties, may not result in patents
being issued. If issued, they may not provide us with proprietary protection or competitive advantages against competitors with similar technology.

Non-payment or delay in payment of patent fees or annuities, whether intentional or unintentional, may result in loss of patents or patent rights important to our business. Many countries, including
certain countries in Europe, have compulsory licensing laws under which a patent owner may be compelled to grant licenses to third parties. In addition, many countries limit the enforceability of patents against third parties, including government
agencies or government contractors. In these countries, the patent owner may have limited remedies, which could materially diminish the value of the patent. In addition, the laws of some foreign countries do not protect intellectual property rights
to the same extent as do the laws of the United States, particularly in the field of medical products and procedures.

Our trade secrets, nondisclosure agreements and other contractual provisions to protect unpatented technology provide only limited and possibly inadequate protection of our rights. As a result, third
parties may be able to use our unpatented technology, and our ability to compete in the market would be reduced. In addition, employees, consultants and others who participate in developing our products or in commercial relationships with us may
breach their agreements with us regarding our intellectual property, and we may not have adequate remedies for the breach.

Third parties may assert that we are infringing their intellectual property rights which may result in litigation.

Successfully commercializing our Sensei system, our Vascular system and any other products we may develop, will depend in
part on our not infringing patents held by third parties. It is possible that one or more of our products, including those that we have developed in conjunction with third parties, infringes existing patents. From time to time, we have received, and
likely will continue to receive, communications from third parties inviting us to license their patents or accusing us of infringement. There can be no assurance that a third party will not take further action, such as filing a patent infringement
lawsuit, including a request for injunctive relief, to bar the manufacture and sale of our Sensei system in the United States or elsewhere. We may also choose to defend ourselves by initiating litigation or administrative proceedings to clarify or
seek a declaration of our rights. As competition in our market grows, the possibility of a patent infringement claim against us or litigation we will initiate increases.



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There may be existing patents which may be broad enough to cover aspects of
our future technology. In addition, because patent applications in many countries such as the United States are maintained under conditions of confidentiality and can take many years to issue, there may be applications now pending of which we are
unaware and which may later result in issued patents that our products infringe. We do not know whether any of these patents, if challenged, would be upheld as valid, enforceable and infringed by our products or technology. From time to time, we
receive, and likely will continue to receive, letters from third parties accusing us of infringing their patents or inviting us to license their patents. We may be sued by, or become involved in an administrative proceeding with, one or more of
these or other third parties. We cannot assure you that a court or administrative body would agree with any arguments or defenses we may present concerning the invalidity, unenforceability or noninfringement of any third-party patent. In addition to
the issued patents of which we are aware, other parties may have filed, and in the future are likely to file, patent applications covering products that are similar or identical to ours. We cannot assure you that any patents issuing from
applications will not cover our products or will not have priority over our own products and patent applications.

We may not be able to maintain or obtain all the licenses from third parties necessary or advisable for promoting, manufacturing and selling our Sensei system and our Vascular system, which may
cause harm to our business, operations and financial condition.

We rely on technology that we license
from others, including technology that is integral to our Sensei system and our Vascular system, such as patents and other intellectual property that we have co-exclusively licensed from Intuitive. Under our agreement with Intuitive, we received the
right to apply Intuitives patent portfolio in the field of intravascular approaches for the diagnosis or treatment of cardiovascular, neurovascular and peripheral vascular diseases. To the extent that we develop or commercialize robotic
capability outside the field of use covered by our license with Intuitive, which we may choose to do at some time in the future, we may not have the patent protection and the freedom to operate outside the field which is afforded by the license
inside the field. Although we believe that there are opportunities for us to operate outside the licensed field of use without using Intuitives intellectual property, Intuitive from time to time has told us that it believes certain of our past
activities that have fallen outside the licensed field have infringed its intellectual property rights. Although we disagree with Intuitives position, we presently remain focused within our licensed field and so have agreed to inform Intuitive
before commencing any further outside clinical investigations for endoluminal applications or engaging in external technology exhibitions at non-intravascular conferences. There can be no assurance that Intuitive will not challenge any activities we
engage in outside the intravascular space, and we cannot assure you that in the event of such a challenge we would be able to reach agreement with Intuitive on whether activities outside our licensed field may be conducted without the use of the
Intuitives intellectual property. If Intuitive asserts that any of our activities outside the licensed field are infringing their patent or other intellectual property rights or commences litigation against us, we will incur significant costs
defending against such claims or seeking an additional license from Intuitive, and we may be required to limit use of our Sensei system or future products and technologies within our licensed intravascular field if any of our activities outside the
licensed field are judged to infringe Intuitives intellectual property, any of which could cause substantial harm our business, operations and financial condition. Although Intuitive is restricted in how it can terminate our license, if
Intuitive were ever to successfully do so, and if we are unable to obtain another license from Intuitive, we could be required to abandon use of our existing Sensei technology completely and could have to undergo a substantial redesign and
design-around effort, which we cannot assure you would be successful.

The medical device industry is
characterized by patent litigation and we could become subject to litigation that could be costly, result in the diversion of managements attention, require us to pay damages and discontinue selling our products.

The medical device industry is characterized by frequent and extensive litigation and administrative proceedings over
patent and other intellectual property rights. Whether a product infringes a patent involves complex legal and factual issues, the determination of which is often difficult to predict, and the outcome may be uncertain until the court has entered
final judgment and all appeals are exhausted. Our competitors may assert, and have asserted in the past, that our products or the use of our products are covered by United States or foreign patents held by them. This risk is heightened due to the
numerous issued and pending patents relating to the use of robotic and catheter-based procedures in the medical technology field. For example, we have received correspondence from a third party indicating it believes it holds a patent that our
Sensei system may infringe. While we do not believe that the Sensei system infringes this patent, there can be no assurance that the third party will not take further action, such as filing a patent infringement lawsuit, including a request for
injunctive relief, to bar the manufacture and sale of our Sensei system in the United States.



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If relevant patents are upheld as valid and enforceable and we are found to
infringe, we could be prevented from selling our system unless we can obtain a license to use technology or ideas covered by such patent or are able to redesign our Sensei system to avoid infringement. A license may not be available at all or on
commercially reasonable terms, and we may not be able to redesign our products to avoid infringement. Modification of our products or development of new products could require us to conduct additional clinical trials and to revise our filings with
the FDA and other regulatory bodies, which would be time-consuming and expensive. If we are not successful in obtaining a license or redesigning our products, we may be unable to sell our products and our business could suffer. In addition, our
patents may be subject to various invalidity attacks, such as those based upon earlier filed patent applications, patents, publications, products or processes, which might invalidate or limit the scope of the protection that our patents afford.

Infringement actions, validity challenges and other intellectual property claims and proceedings, whether
with or without merit, may cause us to incur substantial costs and could place a significant strain on our financial resources, divert the attention of management from our business and harm our reputation. We have incurred, and expect to continue to
incur, substantial costs in obtaining patents and expect to incur substantial costs defending our proprietary rights. Incurring such costs could have a material adverse effect on our financial condition, results of operations and cash flow.

We cannot be certain that we will successfully defend our patents from infringement or claims of invalidity
or unenforceability, or that we will successfully defend against allegations of infringement of third-party patents. In addition, any public announcements related to litigation or administrative proceedings initiated or threatened by us, or
initiated or threatened against us, could cause our stock price to decline.

We may be subject to
damages resulting from claims that our employees or we have wrongfully used or disclosed alleged trade secrets of their former employers.

Many of our employees were previously employed at universities or other medical device companies, including our competitors or potential competitors. We could in the future be subject to claims that these
employees, or we, have inadvertently or otherwise used or disclosed trade secrets or other proprietary information of their former employers. Litigation may be necessary to defend against these claims. If we fail in defending against such claims, a
court could order us to pay substantial damages and prohibit us from using technologies or features that are essential to our products, if such technologies or features are found to incorporate or be derived from the trade secrets or other
proprietary information of the former employers. An inability to incorporate technologies or features that are important or essential to our products would have a material adverse effect on our business, and may prevent us from selling our products.
In addition, we may lose valuable intellectual property rights or personnel. A loss of key research personnel or their work product could hamper or prevent our ability to commercialize certain potential products, which could severely harm our
business. Even if we are successful in defending against these claims, such litigation could result in substantial costs and be a distraction to management. Incurring such costs could have a material adverse effect on our financial condition,
results of operations and cash flow.



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Additional Risks Related to Regulatory Matters

If we fail to obtain regulatory clearances in other countries for existing products or products under development,
we will not be able to commercialize these products in those countries.

In order to market our
products outside of the United States, we must establish and comply with numerous and varying regulatory requirements of other countries regarding safety and efficacy. Approval procedures vary among countries and can involve additional product
testing and additional administrative review periods. The time required to obtain approval in other countries might differ from that required to obtain FDA clearance. The regulatory approval process in other countries may include all of the risks
detailed above regarding FDA clearance in the United States. Regulatory approval in one country does not ensure regulatory approval in another, but a failure or delay in obtaining regulatory approval in one country may negatively impact the
regulatory process in others. Failure to obtain regulatory approval in other countries or any delay or setback in obtaining such approval could have the same adverse effects described above regarding FDA clearance in the United States.

For example, the European Union requires that medical products receive the right to affix the CE mark. The CE mark is an
international symbol of adherence to quality assurance standards and compliance with applicable European medical device directives. In order to obtain the right to affix the CE mark to our products, we will need to obtain certification that our
processes meet European quality standards. These standards include certification that our product design and manufacturing facility complies with ISO 13485 quality standards. We received CE mark approval for our Artisan catheters in May 2007 and our
Lynx catheters in September 2010. However, future regulatory approvals may be needed. We cannot be certain that we will be successful in meeting European quality standards or other certification requirements.

We may fail to comply with continuing postmarket regulatory requirements of the FDA and other authorities and
become subject to substantial penalties, or marketing experience may show that our device is unsafe, forcing us to recall or withdraw it permanently from the market.

We must comply with continuing regulation by the FDA and other authorities, including the FDAs Quality System
Regulation, or QSR, requirements, labeling and promotional requirements and medical device adverse event and other reporting requirements. If the adverse event reports we file with the FDA regarding death, serious injuries or malfunctions indicate
or suggest that the device presents an unacceptable risk to patients, including when used off-label by physicians, we may be forced to recall the device and/or modify the device or its labeling, or withdraw it permanently from the market. The FDA
has expressed concerns regarding the safety of the device when used with catheters and in procedures not specified in the indication we are seeking, such as ablation catheters and ablation procedures, and we have already filed Medical Device Reports
reporting adverse events during procedures utilizing our technology. Physicians are using our device off-label with ablation catheters in ablation procedures, as well as in other electrophysiology procedures for which we have not collected safety
data, and we therefore cannot assure you that clinical experience will demonstrate that the device is safe for these uses.

Any failure to comply, or any perception that we are not complying, with continuing regulation by the FDA or other authorities, including restrictions regarding off-label promotion, could result in
enforcement action that may include suspension or withdrawal of regulatory clearances or approvals, recalling products, ceasing product marketing, seizure and detention of products, paying significant fines and penalties, criminal prosecution and
similar actions that could limit product sales, delay product shipment and harm our profitability.

In many
foreign countries in which we market our products, we are subject to regulations affecting, among other things, product standards, packaging requirements, labeling requirements, import restrictions, tariff regulations, duties and tax requirements.
Many of these regulations are similar to those of the FDA. In addition, in many countries the national health or social security organizations require our products to be qualified before procedures performed using our products become eligible for
coverage and reimbursement. Failure to receive, or delays in the receipt of, relevant foreign qualifications could have a material adverse effect on our business, financial condition and results of operations. Due to the movement toward
harmonization of standards in the European Union, we expect a changing regulatory environment in Europe characterized by a shift from a country-by-country regulatory system to a European Union-wide single regulatory system. The timing of this
harmonization and its effect on us cannot currently be predicted. Adapting our business to changing regulatory systems could have a material adverse effect on our business, financial condition and results of operations. If we fail to comply with
applicable foreign regulatory requirements, we may be subject to fines, suspension or withdrawal of regulatory clearances, product recalls, seizure of products, operating restrictions and criminal prosecution.



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If we or our contract manufacturers fail to comply with the FDAs
Quality System Regulations or California Department of Health Services requirements, our manufacturing operations could be interrupted and our product sales and operating results could suffer.

Our manufacturing processes, and those of some of our contract manufacturers, are required to comply with the FDAs
Quality System Regulations, or QSR, which cover the procedures and documentation of the design, testing, production, control, quality assurance, labeling, packaging, sterilization, storage and shipping of our devices. The FDA enforces the QSR
through periodic inspections of manufacturing facilities. We and our contract manufacturers are subject to such inspections. If our manufacturing facilities or those of any of our contract manufacturers fail to take satisfactory corrective action in
response to an adverse QSR inspection, the FDA could take enforcement action, including any of the following sanctions, which could have a material impact on our operations:



| |  |  | untitled letters, warning letters, fines, injunctions, consent decrees and civil penalties;
| | - |  | -------------------------------------------------------------------------------------------



| |  |  | unanticipated expenditures to address or defend such actions;
| | - |  | -------------------------------------------------------------



| |  |  | customer notifications for repair, replacement, refunds;
| | - |  | --------------------------------------------------------



| |  |  | recall, detention or seizure of our products;
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| |  |  | operating restrictions or partial suspension or total shutdown of production;
| | - |  | -----------------------------------------------------------------------------



| |  |  | refusing or delaying our requests for 510(k) clearance or premarket approval of new products or modified products;
| | - |  | ------------------------------------------------------------------------------------------------------------------



| |  |  | operating restrictions;
| | - |  | -----------------------



| |  |  | withdrawing 510(k) clearances on PMA approvals that have already been granted;
| | - |  | ------------------------------------------------------------------------------



| |  |  | refusal to grant export approval for our products; or
| | - |  | -----------------------------------------------------



| |  |  | criminal prosecution.
| | - |  | ---------------------

We underwent an FDA inspection, which employed QSIT, in July 2010 and received two inspectional observations. The agency has accepted our responses and the inspection has been closed.

We are subject to the licensing requirements of the California Department of Health Services, or CDHS. We have been
inspected and licensed by the CDHS and remain subject to re-inspection at any time. Failure to maintain a license from the CDHS or to meet the inspection criteria of the CDHS would disrupt our manufacturing processes. If an inspection by the CDHS
indicates that there are deficiencies in our manufacturing process, we could be required to take remedial actions at potentially significant expense, and our facility may be temporarily or permanently closed.



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If our products cause or contribute to a death or a serious injury, or
malfunction in certain ways, we will be subject to medical device reporting regulations, which can result in voluntary corrective actions or agency enforcement actions. An increased frequency of filing Medical Device Reports concerning adverse
events occurring during procedures performed with our technology could result in increased regulatory scrutiny of our products and could delay or prevent the adoption of our products.

Under the FDA medical device reporting regulations, medical device manufacturers are required to report to the FDA when
the manufacturer becomes aware of information from any source that alleges that a device marketed by the manufacturer has or may have caused or contributed to a death or serious injury or has malfunctioned in a way that would likely cause or
contribute to death or serious injury if the malfunction of the device or one of our similar devices were to recur. If we fail to report these events to the FDA within the required timeframes, or at all, FDA could take enforcement action against us.
Any such adverse event involving our products also could result in future voluntary corrective actions, such as recalls or customer notifications, or agency action, such as inspection or enforcement action. Any corrective action, whether voluntary
or involuntary, as well as defending ourselves in a lawsuit, will require the dedication of our time and capital, distract management from operating our business, and may harm our reputation and financial results.

We have filed Medical Device Reports, or MDRs, reporting adverse events during procedures utilizing our technology and
have developed internal systems and processes that are designed to evaluate future events that may require adverse event reporting to the FDA. As the frequency of use of our technology in electrophysiology procedures increases, we are experiencing,
and anticipate continuing to experience, it being necessary to file an increased number of MDRs. An increased frequency of filing MDRs or a failure to timely file MDRs may result in FDA requests for further information, which could delay other
matters that we may have pending before the FDA, or result in additional regulatory action. An increased frequency of MDRs could also reduce confidence in the safety of our products and delay or prevent the acceptance of our products by physicians
and hospitals, which would harm our business and cause our stock price to decline.

Our products may in
the future be subject to product recalls that could harm our reputation, business and financial results.

The FDA and similar foreign governmental authorities have the authority to require the recall of commercialized products
in the event of material deficiencies or defects in design or manufacture. In the case of the FDA, the authority to require a recall must be based on an FDA finding that there is a reasonable probability that the device would cause serious injury or
death. In addition, foreign governmental bodies have the authority to require the recall of our products in the event of material deficiencies or defects in design or manufacture. Manufacturers may, under their own initiative, recall a product if
any material deficiency in a device is found. A government-mandated or voluntary recall by us or one of our distributors could occur as a result of component failures, manufacturing errors, design or labeling defects or other deficiencies and
issues. For example, in May 2008, we initiated a voluntary recall of a limited number of our Artisan Control Catheters that were subject to potential leakage, and reported the recall to FDA in accordance with applicable regulations. No patient is
known or suspected to have experienced any consequences associated with the recalled devices and the recall was closed in June 2008. Also, following the introduction of a new catheter in the fall of 2009, some of the new catheters experienced a leak
in the flush assembly. Although no patient is known or suspected to have experienced any consequences associated with the new catheters, we voluntarily recalled all of the new catheters and reported the events to the FDA in accordance with
applicable regulations. Recalls of any of our products would divert managerial and financial resources and have an adverse effect on our financial condition and results of operations. The FDA requires that certain classifications of recalls be
reported to FDA within 10 working days after the recall is initiated. Companies are required to maintain certain records of recalls, even if they are not reportable to the FDA. We may initiate voluntary recalls involving our products in the future
that we determine do not require notification of the FDA. If the FDA disagrees with our determinations, they could require us to report those actions as recalls. A future recall announcement could harm our reputation with customers and negatively
affect our sales. In addition, the FDA could take enforcement action for failing to report the recalls when they were conducted.



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Modifications to our products may, and in some instances, will,
require new regulatory clearances or approvals and may require us to recall or cease marketing our products until clearances or approvals are obtained.

Modifications to our products may require new regulatory approvals or clearances, including 510(k) clearances or premarket approvals, or PMAs, and may require us to recall or cease marketing the modified
devices until these clearances or approvals are obtained. The FDA requires device manufacturers to initially make and document in a letter to file a determination of whether or not a modification requires a new approval, supplement or
clearance. A manufacturer of a 510(k) cleared product is required to obtain 510(k) clearance for device modifications that could significantly affect the safety or effectiveness of the device, or constitute a major change in the intended use of the
subject device. Accordingly, a manufacturer may determine that a modification could not significantly affect safety or efficacy and does not represent a major change in its intended use so that no new 510(k) clearance is necessary. However, the FDA
can review a manufacturers decision and may disagree. The FDA may also on its own initiative determine that a new clearance or approval is required.

We have made modifications to our products in the past and may make additional modifications in the future that we believe do not or will not require additional clearances or approvals because we believe
they can be made on a letter-to-file approach. There can be no assurance that the FDA will agree with our approach in such matters or that, if required, subsequent requests for 510(k) clearance will be received in a timely fashion, if at all. The
FDA may require us to recall and to stop marketing our products as modified or to disable features pending clearance or approval which would significantly harm our ability to sell our products and cause harm to our existing customer relationships
and business. Even if we are not required to take such action, delays in obtaining clearances or approvals for features would adversely affect our ability to introduce enhanced products in a timely manner and would harm our revenue and operating
results. The FDA could also take other enforcement action, including but not limited to, issuing a warning letter relating to our decision to implement features and other product modifications via a letter to file rather than submission of a new
510(k) notice.

Clinical trials necessary to support any future 510(k) or PMA application will be
expensive and may require the enrollment of large numbers of patients, and suitable patients may be difficult to identify and recruit. Delays or failures in our clinical trials may prevent us from commercializing any modified or new products and
will adversely affect our business, operating results and prospects.

Initiating and completing
clinical trials necessary to support a 510(k) or PMA application for expanded indications for use of our existing products, will be time consuming and expensive and the outcome uncertain. Moreover, the results of early clinical trials are not
necessarily predictive of future results, and any product we advance into clinical trials may not have favorable results in later clinical trials.

Conducting successful clinical studies may require the enrollment of large numbers of patients, and suitable patients may be difficult to identify and recruit. Patient enrollment in clinical trials and
completion of patient participation and follow-up depends on many factors, including the size of the patient population, the nature of the trial protocol, the attractiveness of, or the discomforts and risks associated with, the treatments received
by enrolled subjects, the availability of appropriate clinical trial investigators, support staff, and proximity of patients to clinical sites and able to comply with the eligibility and exclusion criteria for participation in the clinical trial and
patient compliance. For example, patients may be discouraged from enrolling in our clinical trials if the trial protocol requires them to undergo extensive post-treatment procedures or follow-up to assess the safety and effectiveness of our products
or if they determine that the treatments received under the trial protocols are not attractive or involve unacceptable risks or discomforts. Patients may also not participate in our clinical trials if they choose to participate in contemporaneous
clinical trials of competitive products. We have received IDE approval for an approximately 300 patient study for the treatment of atrial fibrillation and enrolled our first patient in May 2010. We hope to complete enrollment by the end of 2011.
Additionally, we may modify the timing of planned enrollment in the future to minimize expenditures. The study will include a seven-day follow-up for safety and a one-year follow-up for efficacy at intervals of 90, 180, and 365 days.



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Development of sufficient and appropriate clinical protocols to demonstrate
safety and efficacy may be required and we may not adequately develop such protocols to support clearance or approval. Delays in patient enrollment or failure of patients to continue to participate in a clinical trial may cause an increase in costs
and delays in the approval and attempted commercialization of our products or result in the failure of the clinical trial. In addition, despite considerable time and expense invested in our clinical trials, FDA may not consider our data adequate to
demonstrate safety and efficacy. Such increased costs and delays or failures could adversely affect our business, operating results and prospects.

If we fail to comply with healthcare laws and regulations, we could face substantial penalties and our business, operations and financial condition could be adversely affected.

While we do not control referrals of healthcare services or bill directly to Medicare, Medicaid or other third-party
payors, due to the breadth of many healthcare laws and regulations, we cannot assure you that they will not apply to our business. We could be subject to healthcare fraud and patient privacy regulation by both the federal government and the states
in which we conduct our business. The regulations that may affect our ability to operate include:



| |  |  | the federal healthcare program Anti-Kickback Law, which prohibits, among other things, persons from soliciting, receiving or providing remuneration,
directly or indirectly, to induce either the referral of an individual, for an item or service or the purchasing or ordering of a good or service, for which payment may be made under federal healthcare programs such as the Medicare and Medicaid
programs;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | federal false claims laws which prohibit, among other things, individuals or entities from knowingly presenting, or causing to be presented, claims
for payment from Medicare, Medicaid, or other third-party payors that are false or fraudulent, and which may apply to entities like us which provide coding and billing advice to customers or whose products are frequently used off-label;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, which prohibits executing a scheme to defraud any healthcare
benefit program or making false statements relating to healthcare matters and which also imposes certain requirements relating to the privacy, security and transmission of individually identifiable health information;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | federal self-referral laws, such as STARK, which prohibit a physician from making a referral to a provider of certain health services with which the
physician or the physicians family member has a financial interest, and prohibits submission of a claim for reimbursement pursuant to a prohibited referral; and
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | state law equivalents of each of the above federal laws, such as anti-kickback and false claims laws which may apply to items or services reimbursed
by any third-party payor, including commercial insurers, and state laws governing the privacy of health information in certain circumstances, many of which differ from each other in significant ways and often are not preempted by HIPAA, thus
complicating compliance efforts.
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

If our operations are found to be in violation of any of
the laws described above or any other governmental regulations that apply to us, we may be subject to penalties, including civil and criminal penalties, damages, fines, exclusion of our products from reimbursement under Medicare and Medicaid
programs and the curtailment or restructuring of our operations. Any penalties, damages, fines, curtailment or restructuring of our operations could adversely affect our ability to operate our business and our financial results. The risk of our
being found in violation of these laws is increased by the fact that many of them have not been fully interpreted by the regulatory authorities or the courts, and their provisions are open to a variety of interpretations. Any action against us for
violation of these laws, even if we successfully defend against it, could cause us to incur significant legal expenses and divert our managements attention from the operation of our business. Moreover, to achieve compliance with applicable
federal and state privacy, security, and electronic transaction laws, we may be required to modify our operations with respect to the handling of patient information. Implementing these modifications may prove costly. At this time, we are not able
to determine the full consequences to us, including the total cost of compliance, of these various federal and state laws.



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The application of state certificate of need regulations and
compliance with federal and state licensing requirements could substantially limit our ability to sell our products and grow our business.

Some states require healthcare providers to obtain a certificate of need or similar regulatory approval prior to the acquisition of high-cost capital items such as our Sensei system. In many cases, a
limited number of these certificates are available and, as a result, hospitals and other healthcare providers may be unable to obtain a certificate of need for the purchase of our Sensei system. Further, our sales cycle for our system is typically
longer in certificate of need states due to the time it takes our customers to obtain the required approvals. In addition, our customers must meet various federal and state regulatory and/or accreditation requirements in order to receive
reimbursement from government-sponsored healthcare programs such as Medicare and Medicaid and other third-party payors. Any lapse by our customers in maintaining appropriate licensure, certification or accreditation, or the failure of our customers
to satisfy the other necessary requirements under government-sponsored healthcare programs, could cause our sales to decline.

Risks Related to Ownership of Our Common Stock

The trading price of our common stock has been volatile and is likely to be volatile in the future.

The trading price of our common stock has been highly volatile. Further, our common stock has a
limited trading history. Since our initial public offering in November 2006 through April 29, 2011, our stock price has fluctuated from a low of $1.24 to a high of $39.32. The market price for our common stock may be affected by a number of
factors, including:



| |  |  | the announcement of our operating results, including the number of our Sensei systems sold during a period and our revenue for the period, and the
comparison of these results to the expectations of analysts and investors;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the receipt, denial or timing of regulatory clearances, approvals or actions of our products or competing products;
| | - |  | -------------------------------------------------------------------------------------------------------------------



| |  |  | sales of common stock or other debt or equity securities by us or our stockholders in the future;
| | - |  | -------------------------------------------------------------------------------------------------



| |  |  | the success of any collaborations we may undertake with other companies;
| | - |  | ------------------------------------------------------------------------



| |  |  | our ability to develop, introduce and market new or enhanced versions of our products on a timely basis;
| | - |  | --------------------------------------------------------------------------------------------------------



| |  |  | additions or departures of key scientific or management personnel;
| | - |  | ------------------------------------------------------------------



| |  |  | the pace of enrollment or results of our 300 patient clinical trial or any other clinical trials;
| | - |  | -------------------------------------------------------------------------------------------------



| |  |  | changes in policies affecting third-party coverage and reimbursement in the United States and other countries;
| | - |  | --------------------------------------------------------------------------------------------------------------



| |  |  | ability of our products to achieve market success;
| | - |  | --------------------------------------------------



| |  |  | the performance of third-party contract manufacturers and component suppliers;
| | - |  | ------------------------------------------------------------------------------



| |  |  | our ability to develop sales and marketing capabilities;
| | - |  | --------------------------------------------------------



| |  |  | our ability to manufacture our products to meet commercial and regulatory standards;
| | - |  | ------------------------------------------------------------------------------------



| |  |  | our ability to manage costs and improve margins;
| | - |  | ------------------------------------------------



| |  |  | actual or anticipated variations in our results of operations or those of our competitors;
| | - |  | ------------------------------------------------------------------------------------------



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| |  |  | announcements of new products, technological innovations or product advancements by us or our competitors;
| | - |  | ----------------------------------------------------------------------------------------------------------



| |  |  | announcements of acquisitions or dispositions by us or our competitors;
| | - |  | -----------------------------------------------------------------------



| |  |  | developments with respect to patents and other intellectual property rights;
| | - |  | ----------------------------------------------------------------------------



| |  |  | disputes or other developments relating to proprietary rights, including patents, litigation matters and our ability to obtain patent protection for
our technologies;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | trading volume of our common stock;
| | - |  | -----------------------------------



| |  |  | our announcements of guidance regarding future operating or financial results which fails to meet investor or analyst expectations or which differs
from our previously-announced guidance;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | changes in earnings estimates or recommendations by securities analysts, failure to obtain analyst coverage of our common stock or our failure to
achieve analyst earnings estimates;
| | - |  | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | public statements by analysts or clinicians regarding their perceptions of the effectiveness of our products;
| | - |  | -------------------------------------------------------------------------------------------------------------



| |  |  | developments in our industry;
| | - |  | -----------------------------



| |  |  | general market conditions and other factors unrelated to our operating performance or the operating performance of our competitors; and
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------



| |  |  | the impact of shareholder lawsuits and governmental investigations both on us and on our public perception.
| | - |  | -----------------------------------------------------------------------------------------------------------

The stock prices of many companies in the medical device industry have experienced wide fluctuations that have often been
unrelated to the operating performance of these companies. Following periods of volatility in the market price of a companys securities, stockholders have often instituted class action securities litigation against those companies. Additional
class action securities litigation, if instituted against us, could result in substantial costs and a diversion of our management resources, which could significantly harm our business.

Securities analysts may not continue, or additional securities analysts may not initiate, coverage for our common
stock or may issue negative reports, and this may have a negative impact on the market price of our common stock.

Currently, several securities analysts provide research coverage of our common stock. Several analysts have already published statements that do not portray our technology, products or procedures using
our products in a positive light and others may do so in the future. If we are unable to educate those who publicize such reports about the benefits we believe our technology provides, or if one or more of the analysts who elects to cover us
downgrades our stock, our stock price would likely decline rapidly. If one or more of these analysts ceases coverage of our company, we could lose visibility in the market, which in turn could cause our stock price to decline. The trading market for
our common stock may be affected in part by the research and reports that industry or financial analysts publish about us or our business. If sufficient securities analysts do not cover our common stock, the lack of research coverage may adversely
affect the market price of our common stock. It may be difficult for companies such as ours, with smaller market capitalizations, to attract and maintain sufficient independent financial analysts that will cover our common stock. This could have a
negative effect on the market price of our stock.

Our principal stockholders, directors and management
own a large percentage of our voting stock, which allows them to exercise significant influence over matters subject to stockholder approval.

Our executive officers, directors and stockholders holding five percent or more of our outstanding common stock beneficially own or control approximately 24.3 percent of the outstanding shares of our
common stock as of April 29, 2011. Accordingly, these executive officers, directors and principal stockholders, acting as a group, have substantial influence over the outcome of corporate actions requiring stockholder approval, including the
election of directors, any merger, consolidation or sale of all or substantially all of our assets or any other significant corporate transaction. These stockholders may also delay or prevent a change of control or otherwise discourage a potential
acquirer from attempting to obtain control of us, even if such a change of control would benefit our other stockholders. This significant concentration of stock ownership may adversely affect the trading price of our common stock due to
investors perception that conflicts of interest may exist or arise.



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We have not paid dividends in the past and do not expect to pay
dividends in the future, and any return on investment may be limited to the value of our common stock.

We have never paid dividends on our common stock and do not anticipate paying dividends on our common stock in the
foreseeable future. The payment of dividends on our common stock will depend on our earnings, financial condition and other business and economic factors affecting us at such time as our Board of Directors may consider relevant. If we do not pay
dividends, our common stock may be less valuable because a return on your investment will only occur if our stock price appreciates. Pursuant to our agreement with Silicon Valley Bank, we must obtain Silicon Valley Banks prior written consent
in order to pay any dividends on our common stock.

Some provisions of our charter documents and
Delaware law may have anti-takeover effects that could discourage an acquisition of us by others, even if an acquisition would be beneficial to our stockholders.

Provisions in our amended and restated certificate of incorporation and amended and restated bylaws, as well as provisions
of Delaware law, could make it more difficult for a third party to acquire us, even if doing so would benefit our stockholders. These provisions:



| |  |  | permit our Board of Directors to issue up to 10,000,000 shares of preferred stock, with any rights, preferences and privileges as they may
designate, including the right to approve an acquisition or other change in our control;
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | provide that the authorized number of directors may be changed only by resolution of the Board of Directors;
| | - |  | ------------------------------------------------------------------------------------------------------------



| |  |  | provide that all vacancies, including newly created directorships, may, except as otherwise required by law, be filled by the affirmative vote of a
majority of directors then in office, even if less than a quorum;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | divide our Board of Directors into three classes;
| | - |  | -------------------------------------------------



| |  |  | require that any action to be taken by our stockholders must be effected at a duly called annual or special meeting of stockholders and not be taken
by written consent;
| | - |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | provide that stockholders seeking to present proposals before a meeting of stockholders or to nominate candidates for election as directors at a
meeting of stockholders must provide notice in writing in a timely manner, and also specify requirements as to the form and content of a stockholders notice;
| | - |  | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | do not provide for cumulative voting rights, therefore allowing the holders of a majority of the shares of common stock entitled to vote in any
election of directors to elect all of the directors standing for election, if they should so choose;
| | - |  | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | provide that special meetings of our stockholders may be called only by the chairman of the Board, our chief executive officer or by the Board of
Directors pursuant to a resolution adopted by a majority of the total number of authorized directors; and
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



| |  |  | provide that stockholders will be permitted to amend our amended and restated bylaws only upon receiving at least 662/3percent of the votes entitled to be cast by holders of all
outstanding shares then entitled to vote generally in the election of directors, voting together as a single class.
| | - |  | -----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



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In addition, we are subject to Section 203 of the Delaware General
Corporation Law, which generally prohibits a Delaware corporation from engaging in any broad range of business combinations with any stockholder who owns, or at any time in the last three years owned, 15 percent or more of our outstanding voting
stock for a period of three years following the date on which the stockholder became an interested stockholder. This provision could have the effect of delaying or preventing a change of control, whether or not it is desired by or beneficial to our
stockholders.

Future sales of shares of our common stock, the announcement to undertake such sales, or
the perception that they may occur, may depress the market price of our common stock.

Sales of our
common stock or securities convertible into or exercisable for our common stock by us or by our stockholders, announcements of the proposed sales of our common stock or securities convertible into or exercisable for our common stock or the
perception that sales may be made, could cause the market price of our common stock to decline. We may issue additional shares of our common stock in follow-on offerings to raise additional capital or in connection with acquisitions, corporate
alliances or settlements with third parties and we plan to issue additional shares to our employees, directors or consultants in connection with their services to us. All of the currently outstanding shares of our common stock are freely tradable
under federal and state securities laws, except for shares held by our directors, officers and certain greater than five percent stockholders, which may be subject to volume limitations. Due to these factors, sales of a substantial number of shares
of our common stock in the public market could occur at any time. Such sales could reduce the market price of our common stock.

Our financial results may vary significantly from period to period, which may reduce our stock price.

Our financial results may fluctuate as a result of a number of factors, many of which are outside of our control, which may cause the market price of our common stock to fall. For these reasons, comparing
our operating results on a period-to-period basis may not be meaningful, and you should not rely on our past results as an indication of our future performance. Our financial results may be negatively affected by any of the risk factors listed in
this Risk Factors section.

We incur significant costs as a result of operating as a public
company, and our management is required to devote substantial time to new compliance initiatives.

As a
public company, we incur significant legal, accounting and other expenses that we did not incur as a private company. In addition, the Sarbanes-Oxley Act, as well as rules subsequently implemented by the United States Securities and Exchange
Commission and the Nasdaq Global Market, have imposed various new requirements on public companies, including requiring establishment and maintenance of effective disclosure and financial controls and changes in corporate governance practices. Our
management and other personnel devote a substantial amount of time to these requirements. Moreover, these rules and regulations increase our legal and financial compliance costs and make some activities more time-consuming and costly. For example,
we expect these rules and regulations to make it more difficult and more expensive for us to obtain director and officer liability insurance, and we may be required to incur substantial costs to maintain the same or similar coverage.

The Sarbanes-Oxley Act of 2002, or Sarbanes-Oxley Act, requires, among other things, that we maintain effective internal
control for financial reporting and disclosure controls and procedures. In particular, commencing in fiscal 2007, we were required to perform a system and process evaluation and testing of our internal control over financial reporting to allow
management and our independent registered public accounting firm to report on the effectiveness of our internal control over financial reporting, as required by Section 404 of the Sarbanes-Oxley Act. As a result of our compliance with
Section 404, we have incurred and will continue to incur substantial accounting expense and expend significant management efforts and we may need to hire additional accounting and financial staff with appropriate public company experience and
technical accounting knowledge to ensure continuing compliance.



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ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE
OF PROCEEDS

(a)    Sales of Unregistered Securities

Not applicable

(b)    Uses of Proceeds from Sale of Registered Securities

Not applicable

(c)    Purchases of Equity
Securities

None.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

None.

ITEM 4. (REMOVED AND RESERVED)

None.

ITEM 5. OTHER INFORMATION

None.



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ITEM 6. EXHIBITS

Exhibits



|              |  |                                                                                                                                                                                                             
|------------- |  | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|ExhibitNumber |  | Description                                                                                                                                                                                                 
|3.1(1)        |  | Amended and Restated Certificate of Incorporation of the Registrant.                                                                                                                                        
|              | 
|3.2(2)        |  | Amended and Restated Bylaws of the Registrant.                                                                                                                                                              
|              | 
|4.1(3)        |  | Specimen Common Stock Certificate.                                                                                                                                                                          
|              | 
|4.2(3)        |  | Amended and Restated Investor Rights Agreement, dated November 10, 2005, between the Registrant and certain of
its stockholders.                                                                            
|              | 
|10.68**       |  | Patent and Technology License and Purchase Agreement by and between the Registrant, Koninklijke Philips
Electronics N.V. and Philips Medical Systems Nederland B.V., dated February 2, 2011.                
|              | 
|10.69**       |  | Sublicense Agreement Between SPE and Philips by and between ECL7, LLC, Koninklijke Philips Electronics N.V. and
Philips Medical Systems Nederland B.V., dated February 3, 2011.                             
|              | 
|10.70**       |  | Assignment And License Agreement Between Hansen and SPE by and between the Registrant and ECL7, LLC, dated
February 3, 2011.                                                                                
|              | 
|10.71**       |  | Security Agreement by and between ECL7, LLC, Koninklijke Philips Electronics N.V., and Philips Medical Systems
Nederland B.V., dated February 3, 2011.                                                      
|              | 
|10.72**       |  | Amendment No. 1 to Extended Joint Development Agreement by and between the Registrant and Philips Medical Systems
Nederland B.V. dated as of February 3, 2011.                                              
|              | 
|10.73         |  | Patent License Security Agreement by and between ECL7, LLC, Koninklijke Philips Electronics N.V. and Philips
Medical Systems Nederland B.V., dated February 3, 2011.                                        
|              | 
|10.74**       |  | Amendment No. 1 to Patent and Technology License and Purchase Agreement by and between the Registrant,
Koninklijke Philips Electronics N.V. and Philips Medical Systems Nederland B.V., dated April 7, 2011.
|              | 
|10.75+        |  | Amendment to the Offer Letter by and between the Registrant and Michael MacKinnon, dated as of April 22,
2011.                                                                                              
|              | 
|10.76+        |  | Amendment to the Offer Letter by and between the Registrant and Dr. Roland A. Peplinksi, dated as of April 12,
2011.                                                                                        
|              | 
|31.1          |  | Certification of the Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of
2002.                                                                                                     
|              | 
|31.2          |  | Certification of the Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of
2002.                                                                                                     
|              | 
|32.1*         |  | Certification of the Chief Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of
2002.                                                                                                     
|              | 
|32.2*         |  | Certification of the Chief Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of
2002.                                                                                                     





|(1) | Previously filed as an exhibit to Registrants Annual Report on Form 10-K, filed on March 28, 2007 and incorporated herein by reference.
|--- | ----------------------------------------------------------------------------------------------------------------------------------------



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|(2) | Previously filed as an exhibit to Registrants Current Report on Form 8-K, filed on February 16, 2007 and incorporated herein by
reference.
|--- | -------------------------------------------------------------------------------------------------------------------------------------------



|(3) | Previously filed as an exhibit to Registrants Registration Statement on Form S-1, as amended, originally filed on August 16, 2006 and
incorporated herein by reference.
|--- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|+ | Indicates management contract or compensatory plan.
|- | ---------------------------------------------------



|* | The certifications attached hereto as Exhibits 32.1 and 32.2 accompany this Quarterly Report on Form 10-Q/A are not deemed filed with the Securities
and Exchange Commission and are not to be incorporated by reference into any filing of Hansen Medical, Inc. under the Securities Act of 1933, as amended, or the Exchange Act (whether made before or after the date of this Form 10-Q/A), irrespective
of any general incorporation language contained in such filing.
|- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



|** | Confidential treatment has been requested with respect to certain portions of this exhibit.
|-- | -------------------------------------------------------------------------------------------



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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be
signed on its behalf by the undersigned, thereunto duly authorized.



|                    |  |     |  |                                             
|------------------- |  | --- |  | --------------------------------------------
|Dated: May 10, 2011 |  | By: |  | /s/ BRUCE J BARCLAY                         
|                    |  |     |  | Bruce J Barclay                             
|                    |  |     |  | Chief Executive Officer                     
|                    |  |     |  | (Principal Executive Officer)               
|                    |  |    
|Dated: May 10, 2011 |  | By: |  | /s/ PETER OSBORNE                           
|                    |  |     |  | Peter Osborne                               
|                    |  |     |  | Interim Chief Financial Officer             
|                    |  |     |  | (Principal Financial and Accounting
Officer)



71