title: The quest for a valve substitute: perturbations of a clinical surgeon.
mesh_terms: D001021:Aortic Valve / Q000601:surgery; D001705:Bioprosthesis / Q000009:adverse effects*; D004868:Equipment Failure; D006350:Heart Valve Prosthesis / Q000009:adverse effects*; D006801:Humans; D008943:Mitral Valve / Q000601:surgery