Fig. 2

C1,C2 After surgery, the length of the aorta increased from 18.7 cm to 21.8 cm. D1, E1 The aortic diameter at the site of PSO was decreased from 22.25 mm (D1) preoperatively to 17.64 mm (E1) postoperatively. D2, E2 But the aortic diameter at the site of SPO almost kept unchanged before or after the surgery.