title: Surgical treatment of intracranial aneurysms: six-year experience in Belo Horizonte, MG, Brazil.
abstract: Spontaneous subarachnoid hemorrhage accounts for 5 to 10 % of all strokes, with a worldwide incidence of 10.5 / 100000 person/year, varying in individual reports from 1.1 to 96 /100000 person/year. Angiographic and autopsy studies suggest that between 0.5% and 5% of the population have intracranial aneurysms. Approximately 30000 people suffer aneurysmal subarachnoid hemorrhage in the United States each year, and 60% die or are left permanently disabled. We report our experience in the surgical treatment of intracranial aneurysms in a six year period, in Belo Horizonte, Minas Gerais, Brazil. We reviewed the hospital files, surgical and out-patient notes of all patients operated on for the treatment of intracranial aneurysms from January 1997 to January 2003. Four hundred and seventy-seven patients were submitted to 525 craniotomies for treatment of 630 intracranial aneurysms. The majority of patients were female (72.1%) in the fourth or fifth decade of life. Anterior circulation aneurysms were more common (94.4%). The most common location for the aneurysm was the middle cerebral artery bifurcation. The patients were followed by a period from 1 month to 5 years. The outcome was measured by the Glasgow Outcome Scale (GOS). At discharge, 62.1% of the patients were classified as GOS 5, 13.9% as GOS 4, 8.7% as GOS 3, 1.7% as GOS 2 and 14.8% as GOS 1.
authors.affiliation: Neurosurgeon, Benjamin Guimarães Foundation and Hospital Evangélico, Belo Horizonte MG, Brazil.
authors.forename: Leodante Batista da
authors.initials: LB
authors.lastname: Costa
authors.forename: Josaphat Vilela de
authors.initials: JV
authors.lastname: Morais
authors.forename: Agustinho de
authors.initials: Ad
authors.lastname: Andrade
authors.forename: Marcelo Duarte
authors.initials: MD
authors.lastname: Vilela
authors.forename: Renato P Campolina
authors.initials: RP
authors.lastname: Pontes
authors.forename: Bruno Perocco
authors.initials: BP
authors.lastname: Braga
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001938:Brazil / Q000453:epidemiology; D002533:Cerebral Angiography; D002648:Child; D005260:Female; D005500:Follow-Up Studies; D023261:Glasgow Outcome Scale; D006801:Humans; D002532:Intracranial Aneurysm / Q000401:mortality / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D010351:Patient Discharge / Q000592:standards; D013345:Subarachnoid Hemorrhage / Q000401:mortality / Q000601:surgery*