echocardiography: diastolic time-velocity integral (TVI) of distal right pulmonary vein
echocardiography: diastolic time-velocity integral (tvi) of distal right pulmonary vein
echocardiography: diastolic time-velocity integral (TVI) of distal right pulmonary vein (procedure)
echocardiography: diastolic time-velocity integral (tvi) of distal right pulmonary vein (procedure)