Eight years of experience with the Björk-Shiley tilting disc valve prosthesis in 833 patients.
D001021:Aortic Valve / Q000601:surgery; D005860:Germany, West; D006349:Heart Valve Diseases / Q000601:surgery; D006350:Heart Valve Prosthesis / Q000009:adverse effects / Q000401:mortality / Q000592:standards; D006439:Hemodynamics; D006801:Humans; D008722:Methods; D008943:Mitral Valve / Q000601:surgery; D011379:Prognosis