echocardiography: systolic time intervals (STI) of aortic valve at end of expiration
echocardiography: systolic time intervals (sti) of aortic valve at end of expiration
echocardiography: systolic time intervals (STI) of aortic valve at end of expiration
echocardiography: systolic time intervals (sti) of aortic valve at end of expiration