echocardiography: systolic velocity V1/V2 ratio of aortic valve at end of expiration
echocardiography: systolic velocity v1/v2 ratio of aortic valve at end of expiration
echocardiography: systolic velocity V1/V2 ratio of aortic valve at end of expiration
echocardiography: systolic velocity v1/v2 ratio of aortic valve at end of expiration