echocardiography: systolic time-velocity integral (TVI) of descending thoracic aorta at end of expiration
echocardiography: systolic time-velocity integral (tvi) of descending thoracic aorta at end of expiration
echocardiography: systolic time-velocity integral (TVI) of descending thoracic aorta at end of expiration (procedure)
echocardiography: systolic time-velocity integral (tvi) of descending thoracic aorta at end of expiration (procedure)