Quantification of computer analyzed serial EEGs from stroke patients.

While considerable studies have been conducted by others in automation of the EEG, this method does appear to hold promise for quantitative evaluation and automation of the EEG in the CVA patients or those with similar neurologic deficits. Patients were followed up to 1 year post-ictus. The computerized evaluation of serial records in the CVA patients showed trends which were similar to the percent disability of the patients who were graded neurologically. The patients included in the study were those with middle cerebral artery, carotid and vertebro-basilar defects. A substantial increase in the low frequency activity with a concomitant decrease in high frequency activity was observed in the CVA patients. The results observed in these patient examples demonstrate the utility and efficacy of one method of automated analysis of serial EEGs. The parameters defined by this study have proven to be consistent and effective measures. Since these parameters are objective, they are not affected by patient histories and hence, can be utilized to track the ongoing EEG activity and the accompanying clinical state regardless of the disease entity or the course of therapy pursued. The addition of automated objective quantitative measures to EEG analysis provides a dimension not currently available to the clinician.