echocardiography: atrial reversal time-velocity integral (TVI) of superior vena cava at end of expiration
echocardiography: atrial reversal time-velocity integral (tvi) of superior vena cava at end of expiration
echocardiogram SVC flow velocity atrial reversal TVI at end of expiration
echocardiogram svc flow velocity atrial reversal tvi at end of expiration