Document:

<PAGE>

                                                                    Exhibit 10.9

                           Data Critical Corporation
                     19820 North Creek Parkway, Suite 100
                               Bothell, WA 98011

                                March 12, 2001

Mr. Steve Hannah
1806 Geeting Pl
Placentia CA 92870

Dear Steve:

     It is my pleasure to offer you the following terms and conditions in
consideration of (and effective upon) your becoming an employee of Data Critical
Corporation (the "Company"). References to "you" and "Employee" mean Steve
Hannah.

     1.   Effectiveness of Agreement.  Notwithstanding anything contained herein
          --------------------------
to the contrary, this agreement (this "Agreement") shall become effective only
if and to the extent the Effective Date (as defined below) shall occur;
whereupon this Agreement shall become effective with no further action on the
part of either of the parties hereto, and failing which this Agreement shall be
null and void. This Agreement shall not convey or impose any rights on either
party prior to the Effective Date. Upon becoming effective, this Agreement will
supercede all prior agreements relating to the employment of the Employee with
the Company or its predecessors (including, VitalCom Inc. and its predecessors,
collectively "VitalCom"), all of which other agreements shall cease to be of any
further force or effect.

     For purposes of this Agreement, the "Effective Date" shall mean the date
upon which the following conditions shall have been satisfied:

         (i)    the merger (the "Merger") of VitalCom and Viper Acquisition
     Corp., a Delaware corporation ("VAC"), shall have been consummated in
     accordance with that certain Agreement and Plan of Merger dated of even
     date herewith (as the same may be amended, restated, supplemented or
     otherwise modified from time to time hereafter,the "Merger Agreement")
     between VitalCom, VAC and the Company; and

         (ii)   Employee remains employed by Company at the time such Merger is
     consummated.

     2.  Position.  Employee's position shall be Vice President of Engineering,
         --------
and in such capacity you shall perform such duties as shall be designated for
you by the management of the Company. You will report to the Chief Executive
Officer of the Company unless otherwise designated by the Board of Directors of
the Company (the "Board").

     3.  Compensation and Benefits.  Your compensation shall consist of the
         -------------------------
following:
<PAGE>

     .    A monthly salary of $15,000 (equating to $180,000 per year), subject
          to customary withholding.

     .    Upon achievement of agreed upon objectives, an annual bonus of 25% of
          your annual base salary; it being agreed however that if you remain
          employed with the Company through December 31, 2001, in no event will
          your bonus in respect of 2001 be less than $50,000.

     .    Within 45 days after the Effective Date, the Board of Directors of the
          Company (the "Board") will grant you 20,000 options for the purchase
          of the Company's common stock pursuant to the Company's 1999 Stock
          Option Plan, which options shall vest over 4 years (vesting 25% after
          1 year and monthly thereafter), have a 10 year expiration and have an
          exercise price equal to the market price on the date of grant. These
          options, together with the options into which your VitalCom options
          have been converted, shall become fully-vested and exercisable upon
          any "change of control" of the Company. For purposes hereof, a change
          of control shall be any merger, consolidation, amalgamation or other
          similar transaction pursuant to which the stockholders of Data
          Critical Corporation immediately prior to such transaction will cease
          to own at least 51% of the outstanding voting stock of the entity
          surviving such transaction (other than any such transaction intended
          only to change the domocile of the Company) or the sale by the Company
          of all or substantially all of its assets. The terms of this
          particular item are intended to survive any termination of this
          Agreement or Employee's employment relationship with the Company.

     .    You shall also be eligible to receive subsequent grants of options for
          the purchase of the Company's common stock at the discretion of the
          Board.

     .    You shall be entitled to participate in all other benefit programs
          offered to other similarly situated employees of the Company.

     You will be eligible to participate in our employee benefits program. The
Company currently pays all premiums for its employees and their dependents'
medical, dental, vision, prescription drug card coverage and employee assistance
program through group plans. In addition, the Company pays for basic life,
accidental death and dismemberment and long-term disability insurance for its
employees. All group insurance benefits and Company benefits are subject to
change from time to time.

     The Company offers a 401(k) plan to all eligible employees. Currently, this
is an employee-contribution-only plan provided as a retirement vehicle and as
means of deferring federal income taxes. You may elect to participate in such
plan and to make contributions through payroll deduction.

     4.     Term of Agreement; At-Will Employment.
            -------------------------------------

            (a)  This letter agreement shall have a term of one (1) year,
subject to earlier termination as set forth below (the "Original Term").
                                                        -------------

                                       2
<PAGE>

          (b)  The Company and Employee acknowledge that Employee's employment
is and shall continue to be at-will, as defined under applicable law, and that
Employee's employment with the Company may be terminated by either party at any
time for any or no reason, subject to the terms of this letter agreement. If
Employee's employment terminates for any reason, Employee shall not be entitled
to any payments, benefits, damages, award or compensation other than as provided
in this letter agreement or as otherwise required by law. Any payments,
benefits, damages, awards, or other compensation provided for hereunder upon any
termination hereof shall be inclusive of (and not additive to) any such amounts
required pursuant to any applicable law. The rights and duties created by this
Section 4 may not be modified in any way except by a written agreement executed
by the Company and the Employee. Notwithstanding anything contained in this
Agreement to the contrary, the Company agrees that it will not terminate your
employment for any reason other than Cause (as defined below) at any time prior
to January 1, 2002.

     5.   Severance.  In the event that the Company terminates you at any point
          ---------
in time without Cause (as defined below) at any time during the Original Term of
this letter agreement, the Company will continue to pay your monthly salary of
$15,000 per month (subject to customary withholding) for a period of six months
after such termination in accordance with its standard payroll procedures. For
purposes of this letter, "Cause" shall mean, (a) the commission of an act of
fraud or dishonesty in the course of your employment with the Company; (b)
conviction of, or plea of nolo contendre to, a crime constituting a felony or in
respect of any act of fraud, dishonesty or moral turpitude, (c) willful
misconduct or gross negligence in performance of your duties, including refusal
to comply in any material respect with the directives of the Board or Employee's
supervisors or the Company's policies and procedures, or (d) any willful attempt
to do an injury to the Company, or conduct that materially discredits the
Company or is materially detrimental to the reputation or business of the
Company.

     6.   Covenant.  Employee hereby agrees that he shall not, during the term
          --------
of his employment and for a period of one year after termination of his
employment with the Company and/or any of its affiliates for any reason, do any
of the following without the prior written consent of the Board of Directors of
the Company (for purposes of this Section, the term "Company" shall mean the
Company and each of its subsidiaries):

     (a)  Solicit Business.  Solicit or influence or attempt to influence any
          ----------------
client, customer or other person either directly or indirectly, to direct his or
its purchase of the Company's products and/or services to any Competitor (as
defined below). As used in this Section, a "Competitor" shall mean any company
or other enterprise carrying on or proposing to carry on any business or having
any product line related to the business of the Company, including, without
limitation, in-hospital wireless products or systems; enterprise monitoring or
telemetry products; handheld communications products for doctors, nurses and
other health care professionals; remote monitoring of, or transmission of, ECGs
or other patient medical information; any pacemaker, arrhythmia follow-up or
patient charting software or hardware products or technology for cardiologists
or cardiac surgeons; wireless physician charting products; or any other current
or currently planned (at the time of Employee's termination) products or
businesses by the Company, or that are otherwise competitive with the business
conducted by or planned to be conducted by the Company, nor engage in any other
activities that conflict with Employee's obligations to the Company.

                                       3
<PAGE>

     (b)  No-Hire.  Solicit or influence or attempt to influence, directly or
          -------
indirectly, any person employed by the Company or any of its affiliates to
terminate or otherwise cease his employment with the Company or hire any such
person within 6 months after such person's leaving the Company's employ.

     (c)  Equitable Remedies. Employee acknowledges and agrees that Employee's
          ------------------
breach of this letter agreement will cause irreparable injury to the Company for
which money damages and other remedies at law would be inadequate, and as such
that the Company and/or its affiliates shall be entitled to equitable remedies,
including, without limitation, specific performance and/or temporary or
permanent injunctive relief.

     (d)  Scope.  Employee acknowledges and agrees that the Company has relied
          -----
and is relying on the covenants contained herein in their decision to enter into
this letter agreement and that in light of such reliance the covenants contained
herein are fair and reasonable.

     7.   Confidentiality Agreement.  Employee shall sign, or has signed, a
          -------------------------
Proprietary Information and Invention Assignment Agreement (the "Confidentiality
                                                                 ---------------
Agreement") substantially in the form attached hereto as Exhibit A.  Employee
---------                                                ---------
hereby represents and warrants to the Company that he has complied with all
obligations under the Confidentiality Agreement and agrees to continue to abide
by the terms of the Confidentiality Agreement and further agrees that the
provisions of the Confidentiality Agreement shall survive any termination of
this Agreement or of Employee's employment relationship with the Company.

     8.   Miscellaneous Provisions.
          ------------------------

     (a)  Amendments and Waivers.  The terms of this letter agreement may only
          ----------------------
be amended or waived only with the written consent of the parties.

     (b)  Sole Agreement.  This letter agreement, including any Exhibits
          --------------
hereto, constitutes the sole agreement of the parties and supersedes all oral
negotiations and prior writings with respect to the subject matter hereof.

     (c)  Notices.  Any notice required or permitted by this letter agreement
          -------
shall be in writing and shall be deemed sufficient upon receipt, when delivered
personally or by a nationally-recognized delivery service (such as Federal
Express or UPS), or 48 hours after being deposited in the U.S. mail as certified
or registered mail with postage prepaid, if such notice is addressed to the
party to be notified at such party's address as set forth below or as
subsequently modified by written notice.

     (d)  Choice of Law.  The validity, interpretation, construction and
          -------------
performance of this letter agreement shall be governed by the laws of the State
of California without giving effect to the principles of conflict of laws.

     (e)  Severability.  If one or more provisions of this letter agreement
          ------------
are held to be unenforceable under applicable law, the parties agree to
renegotiate such provision in good faith. In the event that the parties cannot
reach a mutually agreeable and enforceable replacement for such provision, then
(i) such provision shall be excluded from this letter agreement, (ii) the
balance of the Agreement shall be interpreted as if such provision were so
excluded and (iii) the balance of the Agreement shall be enforceable in
accordance with its terms.

                                       4
<PAGE>

     (f)  Counterparts.  This letter agreement may be executed in counterparts,
          ------------
each of which shall be deemed an original, but all of which together will
constitute one and the same instrument.

     (g)  Arbitration.  Any dispute or claim arising out of or in connection
          -----------
with this letter agreement will be finally settled by binding arbitration in
Seattle, Washington in accordance with the rules of the American Arbitration
Association by one arbitrator appointed in accordance with said rules. Judgment
on the award rendered by the arbitrator may be entered in any court having
jurisdiction thereof. Notwithstanding the foregoing, the parties may apply to
any court of competent jurisdiction for preliminary or interim equitable relief,
or to compel arbitration in accordance with this paragraph, without breach of
this arbitration provision.

     (h)  Survival.  The provision of Sections 5, 6, 7, and 8(g) of this
          --------
Agreement shall survive both the termination of this letter agreement and/or the
termination of the Employee's employment with the Company and/or its affiliates.

     (i)  Advice of Counsel.  EACH PARTY TO THIS LETTER AGREEMENT ACKNOWLEDGES
          -----------------
THAT, IN EXECUTING THIS LETTER AGREEMENT, SUCH PARTY HAS HAD THE OPPORTUNITY TO
SEEK THE ADVICE OF INDEPENDENT LEGAL COUNSEL, AND HAS READ AND UNDERSTOOD ALL OF
THE TERMS AND PROVISIONS OF THIS LETTER AGREEMENT. THIS LETTER AGREEMENT SHALL
NOT BE CONSTRUED AGAINST ANY PARTY BY REASON OF THE DRAFTING OR PREPARATION
HEREOF.

                           [Signature Page Follows]

                                       5
<PAGE>

     The parties have executed this letter agreement the date first written
above.

                                    DATA CRITICAL CORPORATION:

                                    By:  /s/ Michael E. Singer
                                         ---------------------------------------

                                    Title:  Executive Vice President and Chief
                                            Financial Officer

                                    19820 North Creek Parkway
                                    Suite 100
                                    Bothell, WA  98011

                                    STEPHEN HANNAH

                                    Signature:  /s/ Stephen Hannah
                                              ----------------------------------

                                    1806 Geeting Pl
                                    Placentia CA 92870

                                       6<PAGE>

                                                                   Exhibit 10.10

                             EMPLOYMENT AGREEMENT
                             --------------------

     This Employment Agreement (the "Agreement") is dated as of March 12, 2001
                                     ---------
by and between Frank T. Sample ("Executive") and Data Critical Corporation, a
                                 ---------
Delaware corporation (together with any successor corporation, the "Company").
                                                                    -------

     1.  Effectiveness of Agreement; Effective Date. This Agreement shall become
         ------------------------------------------
effective only if and to the extent the Effective Date (as defined below) shall
occur, and upon the occurrence of which this Agreement shall become effective
with no further action on the part of either of the parties hereto, and failing
which this Agreement shall be null and void.  This Agreement shall not convey or
impose any rights on either party prior to the Effective Date. Upon becoming
effective, this Agreement will supercede all prior agreements relating to the
employment of the Executive with the Company or its predecessors (including,
VitalCom Inc. and its predecessors, collectively "VitalCom"), including without
limitation, that certain Employment Agreement dated as of October 3, 2000 and
all amendments thereto between the Executive and VitalCom and that certain
Employee Severance Agreement dated as of October 3, 1997 between Executive and
VitalCom, all of which agreements shall cease to be of any further force or
effect.

         For purposes of this Agreement, the "Effective Date" shall mean the
                                              --------------
date upon which the following conditions shall have been satisfied:

         (i)    the merger (the "Merger") of VitalCom and Viper Acquisition
                                 ------
     Corp., a Delaware corporation ("MergerSub") shall have been consummated in
                                     ---------
     accordance with that certain Agreement and Plan of Merger dated of even
     date herewith (as the same may be amended, restated, supplemented or
     otherwise modified from time to time hereafter, the "Merger Agreement")
                                                          ----------------
     between VitalCom, MergerSub and the Company; and

         (ii)   Executive remains employed by Company at the time such Merger is
     consummated.

     2.  Term of Agreement.  This Agreement shall commence on the Effective Date
         -----------------
and continue in effect until December 31, 2002, subject to earlier termination
as set forth below (the "Original Term").
                         -------------

     3.  Position; Duties; Board Position.
         --------------------------------

         (a) Position.  Executive shall be employed as Vice Chairman and Group
             --------
President, VitalCom, reporting directly to the Chief Executive Officer of the
Company (the "CEO").  In such position (and notwithstanding anything in the
              ---
Company's by-laws to the contrary), the Executive shall be responsible for
managing the sales effort of VitalCom systems and for such other duties as shall
from time to time be assigned to him by the CEO or the Board

                                      -1-
<PAGE>

of Directors of the Company (the "Board"); provided that authority for all
                                  -----
personnel decisions shall be and shall remain vested in the CEO or his/her
delegees; and provided, further, that all purchase orders for or in respect of
VitalCom systems ("Bookings") shall be subject to the prior approval of the CEO
                   --------
and Chief Financial Officer of the Company.

          The Company also agrees that the Executive shall be appointed to the
Board to serve as Vice Chairman; provided that upon termination of the
Executive's employment as an officer of the Company for any reason whatsoever,
the Executive shall immediately resign from the Board.

          The location at which Executive shall be employed shall be at the
Company's headquarters, currently located at Bothell, Washington.  Executive
acknowledges that performance of his duties will entail extensive travel.

     (b)  Obligations to the Company.  Executive agrees to the best of his
          --------------------------
ability and experience that he will at all times loyally and conscientiously
perform all of the duties and obligations required of and from Executive
pursuant to the express and implicit terms hereof, and to the reasonable
satisfaction of the Company and his supervisor. During the term of Executive's
employment relationship with the Company, Executive further agrees that he will
devote all of his business time and attention to the business of the Company;
provided that the Executive shall be permitted to continue to serve as a
director for IDX Corporation unless the Board determines it is a Competitor (as
defined below). Without limiting the foregoing or the right of the Board to
reassess its determination upon any change in the nature of IDX Corporation's or
the Company's and/or its subsidiaries' respective businesses, the Company hereby
acknowledges that as IDX Corporation's and the Company's respective businesses
are conducted currently, IDX Corporation is not a Competitor.

     The Company will be entitled to all of the benefits and profits arising
from or incident to all such work services and advice other than, in respect of
any Permitted Activities (as defined below), normal course compensation for
Executive's service as a director of IDX Corporation and/or honoraria for
Executive's other Permitted Activities. Executive will not directly or
indirectly engage or participate in any business that is competitive in any
manner with the business of the Company. Nothing in this Agreement will prevent
Executive from accepting speaking or presentation engagements in exchange for
honoraria or from serving on boards of community or charitable organizations
(provided in each case that such opportunities do not interfere with Executive's
duties hereunder) (such activities, together with Executive's service on the IDX
Corporation board of directors, being collectively, "Permitted Activities"), or
                                                     --------------------
from owning no more than 1% of the outstanding equity securities of a
corporation whose stock is listed on a national stock exchange or the Nasdaq
National Market. Executive will comply with and be bound by the Company's
operating policies, procedures and practices as in effect from time to time
during the term of Executive's employment.

     4.   At-Will Employment.  The Company and Executive acknowledge that
          ------------------
Executive's employment is and shall continue to be at-will, as defined under
applicable law, and that Executive's employment with the Company may be
terminated by either party at any time for any or no reason, subject to the
terms of this Agreement. If Executive's employment is

                                      -2-
<PAGE>

terminated for any reason hereunder, Executive shall not be entitled to, and
shall not claim, any severance, payments, perquisites or other compensation or
benefits other than as provided in this Agreement or as otherwise required by
law. Any payments, benefits, damages, awards, or other compensation provided for
hereunder upon any termination hereof shall be inclusive of (and not additive
to) any such amounts required pursuant to any applicable law. The rights and
duties created by this Section 4 may not be modified in any way except by a
written agreement executed by the Board.

     5.  Compensation.  For the duties and services to be performed by Executive
         ------------
hereunder, the Company shall pay Executive, and Executive agrees to accept, the
salary, stock options and other benefits described below in this Section 5.

         (a) Salary.  Executive shall be entitled to receive an annual salary of
             ------
$250,000 (the "Base Salary") payable in accordance with the Company's customary
               -----------
payroll practices (currently in equal semi-monthly payments ), subject to
customary withholding.

         (b) Stock Options.  The Company agrees to grant the Executive 210,000
             -------------
options for the purchase of the Company's common stock (the "New Options") on
                                                             -----------
the Effective Date of this Agreement, which options shall be issued pursuant to,
and in accordance with, the Company's 1999 Stock Option Plan (the "Stock Option
                                                                   ------------
Plan") and the related Stock Option Agreement (the "Stock Option Agreement" and
----                                                ----------------------
together with the Stock Option Plan being the "Option Documents").  Such options
                                               ----------------
shall be issued at an exercise price equal to the market value of the Company's
common stock on the date of grant thereof, shall have an expiration of 10 years.
Such New Options shall vest upon the date occurring 5 years from the date of
grant of such options; provided that such options (or portions thereof) may vest
earlier in accordance with, and subject to the conditions set forth in, Exhibit
B attached hereto or otherwise in accordance with the terms of  the Option
Documents.

     The New Options will be an incentive stock option to the maximum extent
allowed by the Internal Revenue Code of 1986, as amended, and will be subject to
the terms of the Stock Option Documents.

     Executive acknowledges and agrees that upon the termination of his
employment for any reason whatsoever, he shall have no, and claim no, rights to
any portion of the New Options which had not vested prior to his termination.

         (c) Additional Benefits.  Executive will be eligible to participate in
             -------------------
the Company's Executive benefit plans of general application, including without
limitation, those plans covering medical, disability and life insurance in
accordance with the rules established for individual participation in any such
plan and under applicable law. Notwithstanding the foregoing, Executive (x)
shall be entitled to four (4) weeks Paid Time Off (PTO) during each calendar
year (less, in the year of acquisition, PTO or vacation previously used by
Executive prior to the Effective Date), plus, in the case of calendar years 2002
and beyond, three (3) additional vacation days per year that must be used in
that year (and if not so used will be forfeited) and (y) will receive such other
benefits as the Company generally provides to its other Executives of comparable
position. In addition, the Company agrees to pay for Executive's

                                      -3-
<PAGE>

current employer provided term life insurance policy providing for coverage
equal to two times Executive's base salary as of the date hereof; provided that
the Company shall have no obligation to pay premiums in any year in excess of
150% of the premiums in effect as of the date hereof.

         (d) Reimbursement of Other Expenses.  Executive shall be authorized to
             -------------------------------
incur on behalf and for the benefit of, and shall be reimbursed by, the Company
for reasonable expenses, provided that such expenses are substantiated in
accordance with Company policies.

     6.  Termination of Employment and Severance Benefits.
         ------------------------------------------------

         (a) Termination of Employment.  This Agreement may be terminated during
             -------------------------
its Original Term (or any extension thereof) upon the occurrence of any of the
following events:

             (i)    The Company's determination in good faith that it is
terminating Executive for Cause (as defined in Section 7 below) ("Termination
                                                                  -----------
for Cause");
    -----

             (ii)   The Company's determination that it is terminating Executive
without Cause, which determination may be made by the Company at any time at the
Company's sole discretion, for any or no reason ("Termination Without Cause");
                                                  -------------------------
it being agreed that Executive shall be entitled to terminate his Employment
with the Company in the event he no longer reports to the CEO (or the person
performing the duties of the CEO), and such termination shall for all purposes
hereunder be deemed a Termination Without Cause;

             (iii)  The effective date of a written notice sent to the Company
from Executive stating that Executive is electing to terminate his employment
with the Company ("Voluntary Termination"); or
                   ---------------------

             (iv)   Following Executive's death or Disability (as defined in
Section 8 below).

         (b) Severance Benefits.  Executive shall be entitled to receive
             ------------------
severance benefits upon termination of employment with the Company and all of
its affiliates only as set forth in this Section 6(b):

             (i)    Voluntary Termination.  If Executive's employment
                    ---------------------
terminates by Voluntary Termination, then Executive shall not be entitled to
receive payment of any severance benefits. Executive will receive payment(s) for
all Base Salary and unused accrued PTO and/or vacation as of the date of
Executive's termination of employment and Executive's benefits will be continued
under the Company's then existing benefit plans and policies in accordance with
such plans and policies in effect on the date of termination and in accordance
with applicable law.

             (ii)   Involuntary Termination Without Cause.  If Executive's
                    -------------------------------------
employment is terminated under Section 6(a)(ii) above (such termination, a
"Without Cause Termination"), Executive will be entitled to (1) receive payment
 -------------------------
of (x) all Base Salary and

                                      -4-
<PAGE>

unused accrued PTO and/or vacation as of the date of Executive's termination of
employment payable on the next scheduled payroll distribution date (or earlier
if required by law) and (y) severance benefits equal to $250,000, payment of
which shall be made in equal installments (subject to customary withholding)
over a one year period following such termination (such period being the
"Severance Period") in accordance with the Company's standard payroll schedule
 ----------------
and (2) all options (other than the New Options) theretofore granted to the
Executive shall become immediately vested and fully exercisable; provided,
however, that if Executive violates the provisions of Section 10 or the
Confidentiality Agreement, the Company's obligations to make any further
payments to Executive pursuant to the immediately preceding clause (y) shall be
immediately terminated, and Executive hereby agrees to repay immediately any and
all amounts paid to him pursuant to such clause since the date of termination of
his employment with the Company. Health insurance benefits with the same
coverage provided to Executive prior to the termination (e.g. medical, dental,
optical, mental health) and in all other respects significantly comparable to
those in place immediately prior to the termination will be provided at the
Company's cost over the Severance Period (or the earlier termination of payments
pursuant to the immediately preceding proviso).

              (iii) Termination for Cause.  If Executive's employment is
                    ---------------------
terminated for Cause, then Executive shall not be entitled to receive payment of
any severance benefits. Executive will receive payment(s) for all Base Salary
and unused accrued PTO and/or vacation as of the date of Executive's termination
of employment and Executive's benefits will be continued under the Company's
then existing benefit plans and policies in accordance with such plans and
policies in effect on the date of termination and in accordance with applicable
law.

              (iv)  Termination by Reason of Death or Disability.  In the event
                    --------------------------------------------
that Executive's employment with the Company terminates as a result of
Executive's death or Disability (as defined in Section 8 below), Executive or
Executive's estate or representative will receive all Base Salary and unused
accrued PTO and/or vacation as of the date of Executive's death or Disability
and any other benefits payable under the Company's then existing benefit plans
and policies in accordance with such plans and policies in effect on the date of
death or Disability and in accordance with applicable law.

     7.   Definition of Cause.  For purposes of this Agreement, "Cause" for
          -------------------                                    -----
Executive's termination, shall mean:

          (a) Executive's willful misconduct or gross negligence in performance
of his duties, including refusal to comply in any material respect with the
directives of the Board or such Executive's supervisors or the Company's
policies and procedures;

          (b) Dishonest or fraudulent conduct, a deliberate attempt to do an
injury to the Company, or conduct that materially discredits the Company or is
materially detrimental to the reputation or business of the Company, including
conviction of a felony, class three misdemeanor or crime of moral turpitude or
involving fraud (including such convictions resulting from a plea of guilty or
nolo contendre);

                                      -5-
<PAGE>

         (c) Executive's incurable material breach of this Agreement or any
element of the Company's Confidentiality Agreement (as defined below), including
without limitation, Executive's theft or other misappropriation of the Company's
proprietary information;

         (d) Executive's failure to reasonably pursue sales opportunities,
including those identified in the Pipeline (as such term is defined in the
Merger Agreement), which failure has not been remedied within 30 days after
written notice thereof from the Board or the CEO to Executive; or

         (e) Executive's making of disparaging or negative comments regarding
the Company, the Merger, the management, directors and/or employees of the
Company and/or its subsidiaries or the products or services of the Company
and/or its subsidiaries, which are, in any case, materially detrimental to the
Company, except where any such disclosure is required by law and the Executive
has received legal advice that the failure to make any such statement could
subject the Executive to monetary or criminal liability; it being agreed that in
any such circumstance, Executive shall provide reasonable prior notice to the
Company of his intent to make, and the content of, such disclosure to the extent
permitted by law.

     8.  Definition of Disability.  For purposes of this Agreement, "Disability"
         ------------------------                                    ----------
shall mean that Executive has been unable to perform his duties hereunder as the
result of his incapacity due to physical or mental illness which either (x)
continues for at least 120 consecutive calendar days or 100 non-consecutive work
days during any consecutive twelve-month period or (y) after its commencement,
is determined to be total and permanent by a physician selected by the Company
and its insurers and acceptable to Executive or to Executive's legal
representative (with such agreement on acceptability not to be unreasonably
withheld).

     9.  Confidentiality Agreement.  Executive shall sign, or has signed, a
         -------------------------
Proprietary Information and Invention Assignment Agreement (the "Confidentiality
                                                                 ---------------
Agreement") substantially in the form attached hereto as Exhibit A.  Executive
---------                                                ---------
hereby represents and warrants to the Company that he has complied with all
obligations under the Confidentiality Agreement and agrees to continue to abide
by the terms of the Confidentiality Agreement and further agrees that the
provisions of the Confidentiality Agreement shall survive any termination of
this Agreement or of Executive's employment relationship with the Company.

     10. Noncompetition Covenant.  Executive hereby agrees that he shall not,
         -----------------------
during the term of his employment and for a period of one (1) year after
termination of his employment with the Company and/or any of its affiliates for
any reason, do any of the following without the prior written consent of the
Board (for purposes of this Section, the term "Company" shall mean the Company
and each of its subsidiares):

         (a) Compete.  Carry on any business or activity (whether directly or
             -------
indirectly, as a partner, stockholder, principal, agent, director, affiliate,
employee, advisor or consultant) for any company or other enterprise carrying on
or proposing to carry on any business which sells products or services
competitive to the products or services offered, sold or under development by
the Company and/or any of its subsidiaries at anytime while the Executive is or
was employed by the Company, nor engage in any other activities that conflict
with

                                      -6-
<PAGE>

Executive's obligations to the Company (any such company or enterprise, being a
"Competitor").

          (b) Solicit Business.  Solicit or influence or attempt to influence
              ----------------
any client, customer or other person either directly or indirectly, to direct
his or its purchase of the Company's products and/or services to any Competitor.

          (c) No-Hire.  Solicit or influence or attempt to influence, directly
              -------
or indirectly, any person employed by the Company or any of its affiliates to
terminate or otherwise cease his employment with the Company or hire any such
person within 6 months after their leaving the Company's employ. This Section
10(c) is to be read in conjunction with the Confidentiality Agreement executed
by Executive.

Executive acknowledges and agrees that this Agreement is being entered into in
connection with the acquisition by the Company of the Target, of which the
Executive was a key employee and in which Executive held a significant equity
interest.  As such Executive acknowledges and agrees that the Company has relied
and is relying on the covenants contained herein in their decision to consummate
the Merger and that in light of such reliance the covenants contained herein are
fair and reasonable.

     11.  Conflicts.  Executive represents that his performance of all the terms
          ---------
of this Agreement will not breach any other agreement to which Executive is a
party.  Executive has not, and will not during the term of this Agreement, enter
into any oral or written agreement in conflict with any of the provisions of
this Agreement.  Executive further represents that he is entering into or has
entered into an employment relationship with the Company of his own free will.

     12.  Miscellaneous Provisions.
          ------------------------

          (a) Amendments and Waivers.  Any term of this Agreement may be amended
              ----------------------
or waived only with the written consent of the parties.

          (b) Sole Agreement.  This Agreement, including any Exhibits hereto,
              --------------
constitutes the sole agreement of the parties and supersedes all oral
negotiations and prior writings with respect to the subject matter hereof.

          (c) Notices.  Any notice required or permitted by this Agreement shall
              -------
be in writing and shall be deemed sufficient upon receipt, when delivered
personally or by a nationally-recognized delivery service (such as Federal
Express or UPS), or 48 hours after being deposited in the U.S. mail as certified
or registered mail with postage prepaid, if such notice is addressed to the
party to be notified at such party's address as set forth below or as
subsequently modified by written notice.

          (d) Choice of Law.  The validity, interpretation, construction and
              -------------
performance of this Agreement shall be governed by the laws of the State of
Washington, without giving effect to the principles of conflict of laws.

                                      -7-
<PAGE>

          (e) Severability.  If one or more provisions of this Agreement are
              ------------
held to be unenforceable under applicable law, the parties agree to renegotiate
such provision in good faith. In the event that the parties cannot reach a
mutually agreeable and enforceable replacement for such provision, then (i) such
provision shall be excluded from this Agreement, (ii) the balance of the
Agreement shall be interpreted as if such provision were so excluded and (iii)
the balance of the Agreement shall be enforceable in accordance with its terms.

          (f) Counterparts.  This Agreement may be executed in counterparts,
              ------------
each of which shall be deemed an original, but all of which together will
constitute one and the same instrument.

          (g) Arbitration.  Any dispute or claim arising out of or in
              -----------
connection with this Agreement will be finally settled by binding arbitration in
Seattle, Washington in accordance with the rules of the American Arbitration
Association by one arbitrator appointed in accordance with said rules. Judgment
on the award rendered by the arbitrator may be entered in any court having
jurisdiction thereof. Notwithstanding the foregoing, the parties may apply to
any court of competent jurisdiction for preliminary or interim equitable relief,
or to compel arbitration in accordance with this paragraph, without breach of
this arbitration provision. This Section 12(g) shall not apply to the
Confidentiality Agreement.

          (h) Survival.  The provision of Sections 6(b)(ii), 6(b)(iv),  10 and
              --------
12(i) shall survive both the termination of this Agreement and/or the
termination of the Executive's employment with the Company and/or its
affiliates.

          (i) Equitable Remedies.  Executive acknowledges and agrees that
              ------------------
Executive's breach of this Agreement will cause irreparable injury to the
Company for which money damages and other remedies at law would be inadequate,
and as such that the Company and/or its affiliates shall be entitled to
equitable remedies, including, without limitation, specific performance and/or
temporary or permanent injunctive relief.

          (j) Advice of Counsel.  EACH PARTY TO THIS AGREEMENT ACKNOWLEDGES
              -----------------
THAT, IN EXECUTIVE'S EXECUTING THIS AGREEMENT, SUCH PARTY HAS HAD THE
OPPORTUNITY TO SEEK THE ADVICE OF INDEPENDENT LEGAL COUNSEL, AND HAS READ AND
UNDERSTOOD ALL OF THE TERMS AND PROVISIONS OF THIS AGREEMENT. THIS AGREEMENT
SHALL NOT BE CONSTRUED AGAINST ANY PARTY BY REASON OF THE DRAFTING OR
PREPARATION HEREOF.

                           [Signature Page Follows]

                                      -8-
<PAGE>

     The parties have executed this Agreement the date first written above.

                                    COMPANY:

                                    DATA CRITICAL CORPORATION

                                    By: /s/ Michael E. Singer
                                       -----------------------------------------

                                    Title:  Executive Vice President and Chief
                                            Financial Officer

                                    Address:  19820 North Creek Parkway
                                              Suite 100
                                              Bothell, WA  98011

                                    EXECUTIVE:

                                    Signature: /s/ Frank T. Sample
                                              ----------------------------------

                                    Address:  3535 207th Ave SE
                                              Sammamish, WA  98075

                                      -9-

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