The monitoring of interhemispheric coherence at patients with acute ischemic stroke complicated by cerebral edema

Abstract

Objective: to examine the dynamics of spectral and coherent parameters of EEG at patients with brain edema in acute period of ischemic stroke. Material and methods. The analysis of EEG with calculation of interhemispheric coherence parameters in suffered and intact hemispheres at patients with acute ischemic stroke complicated by brain edema was conducted. The 2 groups of patients were determined: patients with favorable and unfavorable course of disease (the dynamics more than 2 scores by NIHS scale). Results. The unfavorable prognostic sign of ischemic strike course is the decrease of interhemispheric coherence parameters in intact cerebral hemisphere in peracute period of disease. The significant compensative increase of interhemispheric correlations in the most regions of intact hemisphere in acute period of ischemic stroke was indicative for patients with unfavorable course of disease (by NIHS scale). The increase of interhemispheric coherence parameters in fronto-temporal and central frontal areas of clinically intact hemisphere during all time of acute period of ischemic stroke in our opinion has the favorable prognostic value for recovery of impaired functions first of all movement disturbances at patients of this group. Conclusion. The estimation of interhemispheric coherence parameters in suffered and intact hemispheres at patients in acute period of ischemic stroke allows predicting the disease outcome.