title: Frequency content of heart sounds and systolic murmurs in patients with porcine bioprosthetic valves: diagnostic value for the early detection of valvular degeneration.
mesh_terms: D001021:Aortic Valve / Q000503:physiopathology; D001705:Bioprosthesis / Q000009:adverse effects*; D006326:Heart Auscultation; D006337:Heart Murmurs; D006347:Heart Sounds; D006349:Heart Valve Diseases / Q000175:diagnosis; D006350:Heart Valve Prosthesis / Q000009:adverse effects*; D006801:Humans; D008943:Mitral Valve / Q000503:physiopathology