Abstract
The vertebrabasilar (VB) system plays an essential role in the circulation of main structures of nervous system. About 25% of ischemic brain strokes are located in the vertebrobasilar circulation. 20-25% of them are due to atherosclerosis, leading to formation of hemodynamically significant stenoses in both vertebral arteries. Catheter angiography proves and visualise with great accuracy vascular pathology along the course of the extracranial segments of cerebral arteries. Interventional treatment in patients with significant vertebral artery stenoses is an established and safe method of treatment, complementing optimal drug therapy, and preceding surgical treatment.
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