title: Orthostatic transient ischemic attacks: a symptom of large vessel occlusion.
abstract: Orthostatic transient ischemic attacks (TIA) are very much rarer than orthostatic generalized cerebral ischemia (syncope). A case is described and previous reports reviewed. Orthostatic TIA appears to occur only with large vessel occlusion. In these patients, collateral blood supply is marginal and unable to support normal postural autoregulation.
mesh_terms: D000368:Aged; D001157:Arterial Occlusive Diseases / Q000175:diagnosis*; D002536:Cerebral Arteries; D003097:Collateral Circulation; D005260:Female; D006801:Humans; D002546:Ischemic Attack, Transient / Q000209:etiology*; D011187:Posture