Long-term follow-up of seizures associated with cerebral arteriovenous malformations. Results of therapy.
Of 115 patients with angiographically demonstrated cerebral arteriovenous malformations (AVMs), seizures occurred in 66 (57%), all of whom had supratentorial AVMs. Seizures were the initial manifestations in 36 patients. In 14 patients seizures developed within 30 days of hemorrhage or surgical resection; in 16 others seizures started within 0.5 to 16 years after hemorrhage or resection. Seizures were infrequent in the majority of patients; in only nine (16%) were they incapacitating. Among 46 patients observed from two to 36 years, 23 (50%) were seizure free for a minimum of two years at follow-up. Neurological deficits on examination and previous occurrence of hemorrhage did not adversely affect seizure control. No significant difference was found between the percentage of seizure-free patients in the medical and surgical groups at follow-up. Irrespective of treatment method, seizures starting within 30 days of hemorrhage or resection had the best prognosis.
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D002538:Intracranial Arteriovenous Malformations / Q000150:complications* / Q000601:surgery; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012189:Retrospective Studies; D012640:Seizures / Q000150:complications* / Q000601:surgery