Subclavian Stump Syndrome Causing a Posterior Circulation Stroke after Thoracic Endovascular Aneurysm Repair (TEVAR) with Adjunctive Carotid to Subclavian Bypass and Endovascular Embolization of the Left Subclavian Artery

Consideration should be given to ligating the subclavian artery immediately proximal to the vertebral artery origin when performing adjunctive carotid subclavian bypass during TEVAR. If this is not done, surveillance computed tomography scans should monitor for the development of propagating thrombus in the subclavian stump.