[EEG findings in patients with aortocoronary bypass--a visual-morphologic analysis in comparison with clinical data].

: In course of a catamnesis during a period of 1,5 up to 5 years after operation we made electroencephalographic examinations in 140 patients submitted to an aorto-coronary-veins-bypass (ACVB). Compared with a control group of corresponding age we observed a significant frequency of focal disturbances, being interpreted as expression of an increased functional lability due to vascular effects. 14 percent of these patients showed evident signs of cerebrovascular insufficiency. 33 percent suffered from symptoms of the unspecific pseudoneurasthenic syndrome, often to be found in the preliminary region of cerebrovascular insufficiency. Compared with the control group we found among the EEG of alpha-type within the ACVB-group a significantly increased number of subvigilant patterns. There were no relations between the extent of these patterns and the clinical syndromes of cerebrovascular insufficiency and pseudoneurasthenia. The increased appearance of fluctuations of vigilance within the group showing a higher vascular morbidity can be regarded as a first step of limited regulative dynamics. The results of this study confirm the necessity of an interdisciplinary medical treatment of patients suffering from arteriosclerosis.