Bioprostheses at twelve years.

From January 1976 through December 1986, seven different types of bioprostheses have been implanted in our center. The following bioprostheses (total 1,414) were implanted in 1,098 patients: Carpentier-Edwards 567, Hancock 302, Liotta 268, Ionescu-Shiley 127, Angell-Shiley 72, Vascor 68, Implamedic 10. Follow-up ranged from 1 to 12 years, cumulative duration of follow-up was 6,747 patient-years and 8,637 valve-years, being 95.4% complete. Cumulative actuarial probability of being free from tissue valve failure (TVF) was 85.1% +/- 2.0% at 10 years, and 61.6% +/- 9.6% at 12 years. Actuarial probability of being free from TVF was 71.2% +/- 10.8% at 12 years for Carpentier-Edwards, 51% +/- 21.7% at 12 years for Hancock, 73.4% +/- 14.1% at 11 years for Angell-Shiley, 53% +/- 27.4% at 9 years for Liotta, 68% +/- 14.8% at 11 years for Ionescu-Shiley, 53.2% +/- 22.2% at 7 years for Vascor, 72.2% +/- 21.5% at 5 years for Implamedic bioprostheses. In this comparison of seven different bioprostheses, there is a large group of valves behaving in a very similar way. Only a few prostheses showed a constant and early negative trend.