title: Heterograft valves. An analysis of clinical results of valve replacement.
mesh_terms: D000818:Animals; D001021:Aortic Valve / Q000601:surgery; D002417:Cattle; D006351:Heart Valves / Q000637:transplantation*; D006801:Humans; D008943:Mitral Valve / Q000601:surgery; D011183:Postoperative Complications; D013552:Swine; D014183:Transplantation, Heterologous