The most common site of acute aoic dissection is
This occurs when a defect or flap occurs in the intima of the aoa, resulting in blood tracking into the aoic tissues splitting the medial layer and creating a false lumen. It most commonly occurs in the ascending aoa or, less often, just distal to left subclan ae. Reference: Bailey and love, 27th edition, page no. 909
Vascular surgery
Right lateral wall of ascending aoa
Arch of aoa
Suprarenal abdominal aoa
Infrarenal abdominal aoa
Right lateral wall of ascending aoa