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