title: Relation of mitral valve closure to the first heart sound in man. Echocardiographic and phonocardiographic assessment.
mesh_terms: D000293:Adolescent; D000328:Adult; D004452:Echocardiography; D004562:Electrocardiography; D005260:Female; D006326:Heart Auscultation; D006339:Heart Rate; D006801:Humans; D008297:Male; D008943:Mitral Valve / Q000502:physiology*; D010701:Phonocardiography; D013997:Time Factors