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