The most common site of acute aoic dissection is:-: (A) Right lateral wall of ascending aoa, (B) Arch of aoa, (C) Suprarenal abdominal aoa, (D) Infrarenal abdominal aoa
Answer is A. AOIC DISSECTION Aoic dissection is caused by circumferential or, less frequently, transverse tear of the intima. MC site: Right lateral wall of the ascending aoa Another common site: Descending thoracic aoa (just below the ligamentum aeriosum). Peak incidence: 6th and 7th decades.