Contour plots of the circumferential stress in the aorta wall (A) before (the oversizing rate = 15%) and (B–H) after the elastic recoil of the FET: (B) the oversizing rate = 0%, (C) 5%, (D) 10%, (E) 15%, (F) 20%, (G) 25% and (H) 30%. FET: frozen elephant trunk.