echocardiography: left ventricular ejection time (LVET) of aortic valve with stress
echocardiography: left ventricular ejection time (lvet) of aortic valve with stress
echocardiography: left ventricular ejection time (LVET) of aortic valve with stress (procedure)
echocardiography: left ventricular ejection time (lvet) of aortic valve with stress (procedure)