Presentation
Altered conscious state secondary to subarachnoid hemorrhage.
Patient Data
Age: 60 years
Gender: Female
From the case:
Aortic arch origin of left vertebral artery
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Variant origin of the left vertebral artery as the third branch of the aortic arch.
Case Discussion
Origin of the left vertebral artery is classically from the left subclavian artery. However, ~5% of left vertebral arteries will have a variable origin with the most common being as a branch of the aortic arch 1.