echocardiography: peak diastolic velocity from time-velocity integral (TVI) of superior vena cava at end of expiration
echocardiography: peak diastolic velocity from time-velocity integral (tvi) of superior vena cava at end of expiration
echocardiography: peak diastolic velocity from time-velocity integral (TVI) of superior vena cava at end of expiration (procedure)
echocardiography: peak diastolic velocity from time-velocity integral (tvi) of superior vena cava at end of expiration (procedure)