Recurrent syncope during mastication.

Steal syndrome is characterized by the disruption of blood flow from specific vascular territories due to perfusion via collateral vessels bypassing an obstructed artery segment. In the neurovascular setting, this can lead to entities such as subclavian steal syndrome or the less prevalent double steal phenomenon, primarily associated with atherosclerosis. We present a case of an early 80s patient with cerebrovascular insufficiency who exhibited neurological deficits during mastication. The angiographic evaluation showed occlusion at the origins of the left common carotid and of the brachiocephalic trunk. This configuration caused the left vertebral artery to be the only vessel filling anterograde. The flow in the right vertebral artery is retrograde, filling the subclavian and the right common carotid artery. Endovascular revascularization of the brachiocephalic trunk was successfully performed using a Gore Viabahn VBX Balloon Expandable Stent (W.L. Gore & Associates, Flagstaff, AZ, USA), leading to symptom resolution.