Left carotid steal. A new observation.
A patient had an occlusion of the left subclavian artery just proximal to the takeoff of a previously placed subclavian-carotid graft. This caused reversal of flow in the graft and a symptomatic steal of blood via to the intracranial arteries. An axilloaxillary graft restored forward flow. In a second patient, a steal occurred from the right carotid and vertebral systems into the distal carotid system of the left side that has been isolated by a proximal carotide artery occlusion from arteriosclerosis. A saphenous vein, used as a bypass from the subclavian to the carotid artery, restored normal flow. Thus, the carotide system may be the low-pressure area responsible for the steal, although this is rarer than the subclavian.
D000368:Aged; D001807:Blood Vessel Prosthesis; D002339:Carotid Arteries / Q000601:surgery; D002340:Carotid Artery Diseases / Q000000981:diagnostic imaging / Q000601:surgery; D002341:Carotid Artery Thrombosis / Q000601:surgery; D002533:Cerebral Angiography; D005260:Female; D006439:Hemodynamics; D006801:Humans; D002546:Ischemic Attack, Transient / Q000209:etiology; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications; D012039:Regional Blood Flow; D012501:Saphenous Vein / Q000637:transplantation; D013348:Subclavian Artery / Q000601:surgery; D014182:Transplantation, Autologous