An unusual collateral from the sinoatrial nodal artery to the left carotid artery in a patient with Takayasu arteritis: a case report.

Takayasu arteritis is a relatively rare disease, with various and sometimes devastating neurological manifestations due to occlusion of the aortic arch branches. Our case highlights the importance of a thorough preoperative evaluation in search of collateral supply in symptomatic patients with Takayasu arteritis.