EXHIBIT 99.1

                          INTERWEST MEDICAL CORPORATION
                    CERTIFICATION OF CHIEF EXECUTIVE OFFICER
                           AND CHIEF FINANCIAL OFFICER
                         PURSUANT TO SECTION 906 OF THE
                    SARBANES-OXLEY ACT OF 2002 (18 USC 1350)


The undersigned, Arch B. Gilbert, the Chief Executive Officer and Chief
Financial Officer of InterWest Medical Corporation (the Company), has executed
this Certification in connection with the filing with the Securities and
Exchange Commission of the Company's current report on Form 10-K (the "Report").

The undersigned hereby certifies that:

- -     the Report fully complies with the requirements of Section 13(a) of the
      Securities Exchange Act of 1934; and

- -     the information contained in the Report fairly presents, in all material
      respects, the financial condition and results of operations of the
      Company.

IN WITNESS WHEREOF, the undersigned has executed this Certification as of the
13th day of May 2003.

               /s/ Arch B. Gilbert
- --------------------------------------------------------------
Arch B. Gilbert
President, Chief Executive Officer and Chief Financial Officer