echocardiography: diastolic peak flow velocity of Blalock-Taussig shunt
echocardiography: diastolic peak flow velocity of blalock-taussig shunt
echocardiography: diastolic peak flow velocity of Blalock-Taussig shunt (procedure)
echocardiography: diastolic peak flow velocity of blalock-taussig shunt (procedure)