Sound waves track cardiac flow.
D000818:Animals; D001022:Aortic Valve Insufficiency / Q000175:diagnosis; D001024:Aortic Valve Stenosis / Q000175:diagnosis; D003326:Coronary Circulation; D004285:Dogs; D004301:Doppler Effect; D004452:Echocardiography; D006331:Heart Diseases / Q000175:diagnosis*; D006343:Heart Septal Defects / Q000175:diagnosis; D006349:Heart Valve Diseases / Q000175:diagnosis*; D006801:Humans; D008944:Mitral Valve Insufficiency / Q000175:diagnosis; D008946:Mitral Valve Stenosis / Q000175:diagnosis; D013318:Stroke Volume