title: The logic of using either two mechanical valves or two bioprosthetic valves for replacement of both mitral and aortic valves.
authors: W C
authors: WC
authors: Roberts
mesh_terms: D001021:Aortic Valve; D001705:Bioprosthesis; D006349:Heart Valve Diseases / Q000601:surgery*; D006350:Heart Valve Prosthesis; D006801:Humans; D008943:Mitral Valve