Dissection of ascending aorta. Rare complication of aortocoronary venous bypass surgery.

Dissection of the ascending aorta is a rare complication of aortocoronary bypass surgery. A 63-year-old man who had received a double graft was found to have dissection of the ascending aorta, which was shown angiographically four months after operation. Since the patient was asymptomatic, operation was postponed. He has been followed up regularly and two years later his condition is still satisfactory.