title: Hyperperfusion syndrome after carotid endarterectomy. CT changes.
abstract: This article describes the CT scans of two patients who, following carotid endarterectomy, developed headache and seizures suggestive of hyperperfusion syndrome. Their CT scans demonstrated ipsilateral mass effect and white matter hypodensity. One patient progressed to hemorrhage and died. Although infarction is described as the commonest neurologic event to occur after carotid endarterectomy, autopsy or cerebral blood flow studies in these patients suggests that the changes were due to hyperperfusion rather that infarction.
authors.affiliation: Department of Radiology, St Paul's Hospital, Vancouver BC, Canada.
authors.forename: P B
authors.initials: PB
authors.lastname: Harrison
authors.forename: M J
authors.initials: MJ
authors.lastname: Wong
authors.forename: A
authors.initials: A
authors.lastname: Belzberg
authors.forename: J
authors.initials: J
authors.lastname: Holden
mesh_terms: D000368:Aged; D001921:Brain / Q000000981:diagnostic imaging* / Q000473:pathology; D002339:Carotid Arteries / Q000601:surgery*; D002560:Cerebrovascular Circulation; D004691:Endarterectomy / Q000009:adverse effects*; D005260:Female; D006801:Humans; D011877:Radionuclide Imaging; D012640:Seizures / Q000209:etiology / Q000503:physiopathology; D013577:Syndrome; D014057:Tomography, X-Ray Computed