Abstract
The left subclavian artery is frequently revascularized by transposition or bypass when zone 2 thoracic endovascular aortic repair is planned, because decreased rates of spinal cord ischemia (SCI) have been reported with this strategy. An anomalous left vertebral artery (aLVA) originating directly from the aortic arch is the second most common arch variant after the bovine trunk, with a reported incidence of 4% to 8%. In addition, 6% to 10% of vertebral arteries will terminate in a posterior inferior cerebellar artery, increasing the risk of stroke if not revascularized.
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