[Pseudoaneurysm of the ascending aorta. Rare complication following aortic valve replacement].

False aneurysm of the ascending aorta has been reported as a rare complication of cardiovascular surgery among which the etiology, the physiopathology and the natural evolution are still badly known. The diagnosis is often fortuitous. The clinical polymorphism of the affection imposes the appeal to the morphological explorations to establish an early diagnosis and determine the adequate therapeutic attitude.