echocardiography: diastolic/systolic time-velocity integral (TVI) ratio of descending thoracic aorta with stress
echocardiography: diastolic/systolic time-velocity integral (tvi) ratio of descending thoracic aorta with stress
echocardiography: diastolic/systolic time-velocity integral (TVI) ratio of descending thoracic aorta with stress
echocardiography: diastolic/systolic time-velocity integral (tvi) ratio of descending thoracic aorta with stress