title: Discussion.
mesh_terms: D006328:Cardiac Catheterization; D004452:Echocardiography; D006350:Heart Valve Prosthesis; D006801:Humans; D008943:Mitral Valve / Q000000981:diagnostic imaging / Q000601:surgery*; D008945:Mitral Valve Prolapse / Q000175:diagnosis / Q000401:mortality / Q000601:surgery*; D012307:Risk Factors; D012720:Severity of Illness Index