DeBakey IIIb aortic dissection associated with thoracic aneurysm was successfully operated upon in a 59-year-old man. The patient had sudden onset of severe back pain and pain in the left lower extremity and dissection associated with thoracic aneurysm was diagnosed. During the operation, we used partial cardiopulmonary bypass support with cannulation of the pulmonary and femoral artery. The entry of the dissection was in a true aneurysm of the descending aorta, and it was replaced with a 22mm Hemashield prosthetic graft. Aortic dissection, with entry in the true aneurysm is rare and is of high risk for rupture.
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