Fig. 1

A Acute aortic arch angulation and a distal arch aneurysm involving the left subclavian artery are also shown on the preoperative computed tomography scan. B Using 8 mm heparin-bonded expanded polytetrafluoroethylene grafts, an extra thoracic bypass from the right subclavian artery to the left subclavian artery and to the left common carotid artery was accomplished