title: Observations on murmurs originating from incompetent heterograft mitral valves.
mesh_terms: D000368:Aged; D004562:Electrocardiography; D005260:Female; D006326:Heart Auscultation; D006333:Heart Failure / Q000209:etiology; D006350:Heart Valve Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D008943:Mitral Valve / Q000637:transplantation*; D008944:Mitral Valve Insufficiency / Q000175:diagnosis / Q000209:etiology*; D014183:Transplantation, Heterologous