Exhibit 99.3

                           CERTIFICATION PURSUANT TO
                            18 U.S.C. Section 1350,
                             AS ADOPTED PURSUANT TO
                 SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


In connection with the Annual Report of ATS Medical, Inc. (the "Company") on
Form 10-K for the period ended December 31, 2002 as filed with the Securities
and Exchange Commission on the date hereof (the "Report"), I, Deborah K.
Chapman, Controller of the Company, certify, pursuant to 18 U.S.C. Section 1350,
as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to
the best of my knowledge:

         1.       The Report fully complies with the requirements of Section
                  13(a) or 15(d) of the Securities Exchange Act of 1934; and

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

                  A signed original of this written statement required by
                  Section 906 has been provided to the Company and will be
                  retained by the Company and furnished to the Securities and
                  Exchange Commission or its staff upon request.



                                     /s/ Deborah K. Chapman
                                     ------------------------------------------
                                     Deborah K. Chapman
                                     Controller
                                     March 26, 2003