title: Subclavian steal from the external carotid circulation.
abstract: Three cases of subclavian steal syndrome with contribution to the retrograde flow of blood in the vertebral artery by the external carotid system are presented. In 1 patient progressive enlargement of an extracranial-intracranial bypass was demonstrated angiographically as the steal from the external carotid system was reduced. It is suggested that this pathway of collateral circulation may not be uncommon, and its recognition may influence the selection of procedure and timing of operation for revascularization of the brain.
mesh_terms: D002342:Carotid Artery, External / Q000000981:diagnostic imaging* / Q000503:physiopathology; D002533:Cerebral Angiography; D003097:Collateral Circulation; D006801:Humans; D008297:Male; D008875:Middle Aged; D013349:Subclavian Steal Syndrome / Q000000981:diagnostic imaging* / Q000503:physiopathology