echocardiography: calculated systolic mean flow gradient of descending thoracic aorta with stress
echocardiography: calculated systolic mean flow gradient of descending thoracic aorta with stress
echocardiography: calculated systolic mean flow gradient of descending thoracic aorta with stress (procedure)
echocardiography: calculated systolic mean flow gradient of descending thoracic aorta with stress (procedure)