EXHIBIT 99.1


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


In connection with the Quarterly Report of St. Jude Medical, Inc., (the
"Company") on Form 10-Q for the period ended September 30, 2002 as filed with
the Securities and Exchange Commission on the date hereof (the "Report"), I,
Terry L. Shepherd, Chief Executive Officer of the Company, certify, pursuant to
18 U.S.C. ss.1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act
of 2002, that:

         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.


                                                         /s/ TERRY L. SHEPHERD
                                                         ---------------------
                                                         Terry L. Shepherd
                                                         Chief Executive Officer
                                                         November 8, 2002