Fig. 1

a) The white arrow indicates pericardial effusion, the blue arrow indicates false lumen, and the yellow arrow indicates the true lumen in the ascending aorta. The red arrow indicates the intimal flap. (b) The white arrow indicates pericardial effusion, and the right ventricle is collapsed due to pericardial effusion. RV right ventricle; LV left ventricle. (c) The yellow arrow is the true saccular aneurysm in the distal arch, and there is no dissection from the arch to the descending aorta. (d) Sagittal image: The white arrow indicates pericardial effusion, the blue arrow indicates false lumen, and the yellow arrow indicates the true lumen in the ascending aorta. The red arrow indicates the intimal flap