title: Doppler echocardiography.
mesh_terms: D001021:Aortic Valve; D001783:Blood Flow Velocity; D002302:Cardiac Output; D003331:Coronary Vessels / Q000033:anatomy & histology; D004452:Echocardiography / Q000295:instrumentation; D006344:Heart Septal Defects, Atrial / Q000175:diagnosis; D006345:Heart Septal Defects, Ventricular / Q000175:diagnosis; D006349:Heart Valve Diseases / Q000175:diagnosis; D006801:Humans; D008943:Mitral Valve; D011666:Pulmonary Valve Stenosis / Q000175:diagnosis; D014465:Ultrasonics / Q000295:instrumentation; D014463:Ultrasonography