**EXHIBIT 31.1**

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**CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICERPURSUANT TO SECTION 302 OF SARBANES-OXLEY ACT OF 2002**

I, John R. Lyon, certify that:

1.                                       I have reviewedthis quarterly report on Form 10-Q**of VistaMedical Technologies, Inc.;

2.                                       Based on my knowledge,this report does not contain any untrue statement of a material fact or omit tostate a material fact necessary to make the statements made, in light of thecircumstances under which such statements were made, not misleading withrespect to the period covered by this ** **report;

3.                                       Based on myknowledge, the financial statements, and other financial information includedin this report, fairly present in all material respects the financialcondition, results of operations and cash flows of the registrant as of, andfor, the periods presented in this report;

4.                                       The registrant’sother certifying officer and I are responsible for establishing and maintainingdisclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e)and 15d-15(e)) for the registrant and have:

a)                                      Designed suchdisclosure controls and procedures, orcaused such disclosure controls and procedures to be designed under oursupervision, to ensure that material information relating to the registrant,including its consolidated subsidiaries, is made known to us by others withinthose entities, particularly during the period in which this report is beingprepared;

b)                                     Evaluated the effectiveness of the registrant’s disclosure controls andprocedures and presented in this report our conclusions about the effectivenessof the disclosure controls and procedures, as of the end of the period coveredby this report based on such evaluation; and

c)                                      Disclosed in this report any change in the registrant’s internal controlover financial reporting that occurred during the registrant’s most recentfiscal quarter that has materially affected, or is reasonably likely tomaterially affect, the registrant’s internal control over financial reporting;and

5.                                       The registrant’s other certifying officer and I have disclosed, based onour most recent evaluation of internal control over financial reporting, to theregistrant’s auditors and the audit committee of the registrant’s board ofdirectors (or persons performing the equivalent functions):

a)                                      all significant deficiencies and material weaknesses in the design oroperation of internal control over financial reporting which are reasonablylikely to adversely affect the registrant’s ability to record, process,summarize and report financial information; and

b)                                     any fraud, whether or not material, that involves management or otheremployees who have a significant role in the registrant’s internal control overfinancial reporting.

Date: August 16, 2004

 

 

 
| /s/ John R. Lyon                   |   |
|------------------------------------|--------|
| John R. Lyon                       |   |
| President, Chief Executive Officer |   |
| and Director                       |   |
|                               |   |

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