title: Relation of the second sound to diastolic vibration of the closed aortic valve.
mesh_terms: D000818:Animals; D001021:Aortic Valve / Q000502:physiology*; D006326:Heart Auscultation; D006347:Heart Sounds; D009040:Motion Pictures; D009200:Myocardial Contraction; D010701:Phonocardiography; D013552:Swine; D014732:Vibration