title: Hyperperfusion syndrome following carotid endarterectomy: evaluation using diffusion-weighted magnetic resonance imaging--case report.
abstract: A 65-year-old female developed hyperperfusion syndrome following carotid endarterectomy for severe stenosis of the left internal carotid artery. Transcranial Doppler monitoring showed a sharp increase in flow velocity in the middle cerebral artery (MCA). Diffusion-weighted magnetic resonance (MR) imaging demonstrated diffuse hyperintensity in the region of the left MCA, which diminished markedly 9 days later. The abnormal hyperintensity decreased as the patient's symptoms improved, suggesting that diffusion-weighted MR imaging can be used for evaluating the course of hyperperfusion syndrome.
authors.affiliation: Department of Neurological Surgery, School of Medicine, University of Tokushima.
authors.forename: K
authors.initials: K
authors.lastname: Shinno
authors.forename: S
authors.initials: S
authors.lastname: Ueda
authors.forename: M
authors.initials: M
authors.lastname: Uno
authors.forename: K
authors.initials: K
authors.lastname: Nishitani
authors.forename: S
authors.initials: S
authors.lastname: Nagahiro
authors.forename: M
authors.initials: M
authors.lastname: Harada
mesh_terms: D000368:Aged; D001783:Blood Flow Velocity / Q000502:physiology; D001921:Brain / Q000098:blood supply*; D002545:Brain Ischemia / Q000601:surgery*; D016894:Endarterectomy, Carotid; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D006940:Hyperemia / Q000175:diagnosis*; D018810:Magnetic Resonance Angiography; D008279:Magnetic Resonance Imaging; D011183:Postoperative Complications / Q000175:diagnosis*