Role of the valves in the genesis of normal heart sounds.
D001021:Aortic Valve / Q000502:physiology*; D004566:Electrodes; D005112:Extracorporeal Circulation; D006326:Heart Auscultation; D006439:Hemodynamics; D006801:Humans; D008722:Methods; D008943:Mitral Valve / Q000502:physiology*; D010701:Phonocardiography