title: Advantages and long term results of the Björk-Shiley valve.
mesh_terms: D001021:Aortic Valve / Q000601:surgery; D001022:Aortic Valve Insufficiency / Q000601:surgery; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis; D006801:Humans; D008943:Mitral Valve / Q000601:surgery