Presentation
Transient ischemic attack
Patient Data
Two diferent origins for left vertebral artery are seen. One arises normally from left subclavian artery and the second arises from the aortic arch. Both vessels follow a parallel course before they link at V2 segment. Distal left vertebral artery follows a normal course to the vertebrovertebral junction.
Case Discussion
An anomalous vertebral artery origin from the aortic arch is the most frequent anatomic variant of the supra-aortic trunk origin.
Duplication (partial or complete) and fenestration of the vertebral artery are found rarely, probably representing persistence of embryonic plexiform vessels.