Analysis of EEG Changes in 50 Patients with Cerebral AVMs

The paper reported the resuits of EEG examination of cerebral arteriovenous malformations （AVM） in 50 patients since March 1986 to February 1990. There were 38 males and 12 females with the age ranged from 7 to 61 years （mean 33 years）. The main manifestations were epilepsy （46.0%） and subarachnoid hemorrhage （34.0%）. All of the patients had EEG changes including local 24 cases of abnormalities （48.0%）, 19 cases of asymmetrical changes （38.0%） and 7 cases of diffuse adnormalities （14.0%）. The results showed that there were the close relations between the type of AVM and the EEG changes. EEG chenge of AVM with fistula was mainly local abnormality （72.48%）, while the EEG change of AVM with expanded capillary was mainly asymmetrical abnommality （81.25%）. The author suggested that EEG examination is significant in analysis and diagnosis of cerebral AVM.