DIRECT DETECTION AND TIMING OF AORTIC  VALVE CLOSURE.
D000818:Animals; D001021:Aortic Valve; D001314:Auscultation; D001775:Blood Circulation; D004285:Dogs; D055724:Electrophysiological Phenomena; D004594:Electrophysiology; D004864:Equipment and Supplies; D006321:Heart; D012106:Research
AORTIC VALVE; AUSCULTATION; BLOOD CIRCULATION; DOGS; ELECTROPHYSIOLOGY; EQUIPMENT AND SUPPLIES; EXPERIMENTAL LAB STUDY; HEART