Surgical treatment of intracranial aneurysms: six-year experience in Belo Horizonte, MG, Brazil.
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.
Costa
Leodante Batista da
LB
Neurosurgeon, Benjamin Guimarães Foundation and Hospital Evangélico, Belo Horizonte MG, Brazil.
Morais
Josaphat Vilela de
JV
Andrade
Agustinho de
Ad
Vilela
Marcelo Duarte
MD
Pontes
Renato P Campolina
RP
Braga
Bruno Perocco
BP
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*