We reviewed our experience with 4 cases of chronic dissecting aortic aneurysm (DeBakey III b) with the false lumen extending into the abdominal aorta and major branches being perfused from the false lumen. In such cases, resection of the intrathoracic portion of the aneurysm and closing of the distral false lumen may exclude visceral perfusion from the false lumen. In order to ensure
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