title: The second heart sound: newer concepts. Part I: normal and wide physiological splitting.
mesh_terms: D000328:Adult; D002037:Bundle-Branch Block / Q000503:physiopathology; D004562:Electrocardiography; D005260:Female; D006326:Heart Auscultation; D006344:Heart Septal Defects, Atrial / Q000503:physiopathology; D006347:Heart Sounds; D006801:Humans; D006976:Hypertension, Pulmonary / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D009200:Myocardial Contraction; D011655:Pulmonary Embolism / Q000503:physiopathology; D011666:Pulmonary Valve Stenosis / Q000503:physiopathology*; D013997:Time Factors; D016276:Ventricular Function