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[Collateral circulation syndromes in the brachiocephalic artery system]
Zhurnal Nevropatologii I Psikhiatrii Imeni S.S. Korsakova (Moscow, Russia : 1952)
|January 1, 1980
Summary
In patients with blocked brachiocephalic arteries, 25% experienced reversed blood flow from the Circle of Willis, often via spinal arteries. This "steal syndrome" can cause transient neurological symptoms, particularly with isolated artery issues.
Area of Science:
- Vascular Surgery
- Neurology
- Radiology
Background:
- Occlusive diseases affecting brachiocephalic arteries can compromise cerebral blood flow.
- Collateral circulation pathways are crucial for maintaining brain perfusion in such cases.
- Understanding these pathways is vital for diagnosing and managing cerebrovascular insufficiency.
Observation:
- Angiographic and clinical data from 56 patients with occluded brachiocephalic arteries were analyzed.
- The study focused on qualitative and quantitative aspects of collateral circulation, specifically retrograde blood flow.
- The connection between these collateral pathways and cerebral circulation was investigated.
Findings:
- Reversion of blood flow from the Circle of Willis was observed in 25% of patients.
- Spinal arteries were the most frequent route for this retrograde flow.
- Subclavian steal syndrome was linked to transient circulatory disturbances in the vertebrobasilar and carotid basins.
Implications:
- Neurological disturbances were most specific in cases of isolated brachiocephalic stem or subclavian artery affections.
- The intensity of retrograde flow is regulated by the level of cerebral circulation.
- Retrograde flow intensity is dependent on the severity of vasocerebral insufficiency.