[EEG, REG and ECG correlations in transient disorders of cerebral circulation in the carotid bassin].

The study is based on analysis of the EEG, REG and ECG correlations under conditions of their synchronous registration in 70 patients with transient disorders of circulation in the basin of the internal carotid artery. The results indicate to certain relationship between disturbances in the rhythm of cardiac activity (cardiac fibrillation, paroxysmal tachycardia, etc.), worsening of the brain hemodynamics and the appearance of hypoxic reactions in the EEG. Most frequently the EEG changes had a character of desynchronized cortical rhythmics. Focal changes in the EEG were registered in 1/4 of the patients and were characterized by inconstant groups of slow and sharp waves mainly in the temporal leads ("transitory" foci). The REG data indicate to an atherosclerotic process and a mild diffuse drop of cerebral blood repletion. The relative stability of the detected EEG changes (1-3 weeks following a regress of neurological disturbances) permit to assume the existence of a latent developing insufficiency of cerebral circulaion.