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Intravascular ultrasound images after thoracic endovascular aortic repair showed the left common carotid artery was partly covered by the stent graft (a, arrow) and left subclavian artery was totally covered (b). The intraoperative angiography did not show the changes in blood flow in the left common carotid artery, but the intravascular ultrasound images and postoperative computed tomography angiography (c) confirmed the fact.
