EXHIBIT 32.1 CERTIFICATION I, Michael D. Dale, Chief Executive Officer of ATS Medical, Inc., certify, pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, 18 U.S.C. Section 1350, that: The Quarterly Report of Form 10-Q of the Company for the quarter ended September 30, 2004 (the "Report") fully complies with the requirements of Section 13(a) of the Securities and Exchange Act of 1934 (15 U.S.C. 78m); and The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company. Date: November 5, 2004 /s/ Michael D. Dale ----------------------- Name: Michael D. Dale Title: Chief Executive Officer