The second heart sound: newer concepts. Part II: Paradoxical splitting and narrow physiological splitting.
D004562:Electrocardiography; D006326:Heart Auscultation; D006329:Heart Conduction System / Q000503:physiopathology; D006331:Heart Diseases / Q000175:diagnosis* / Q000503:physiopathology; D006347:Heart Sounds; D006801:Humans; D008875:Middle Aged