Abstract
Longterm Follow-up: Eighty-nine patients underwent valve replacement with porcine xenograft (31 Hancock, 60 Carpentier-Edwards, and 6 Ionescu-Shiley) from 1975 to 1983. Analysis of the series revealed the following informations; hospital mortality, 16.9%; late mortality 1.9% per patient-year; acturisl 5 and 9 year survival rates, 76%±4.5% and 62%±8.8%, respectively; incidence of thromboembolism, 2.3% per patient-year; incidence of valve failure, 2.3% per patient-year. These results support the discontinued use of porcine xenograft except such cases as over 60-year-old patients, pregnant women, and the patients who can't continue anticoagulant therapy.
