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In 82 patients from 20--35 years of age with vegetative-vascular dystonia the authors studied clinical variants of the disease, the bioelectrical brain activity, the state of cerebral circulation, the visual analyzer, the cardiovascular system, histamine, protein, lipid, carbohydrate metabolism and the state of coagulative blood system. In the majority of the cases the studies demonstrated hystaminemia, some shifts in the biochemical blood content, an increased brain vascular tone, a drop of blood repletion and disturbances of regional hemodynamics. The studies also depicted a decreased functional lability of the main cortical bioelectrical processes, disturbances of electric activity and propulsive possibilities of the myocardium. It was also possible to demonstrate intercorrelation between the biochemical and electrophysiological indices with the type and form of the disease. It is assumed that the leading role in the pathogenesis of the disease belongs to the dysfunction of the limbico-reticular complex. Certain recommendations for normalization of the histamine metabolism are given as well as for the normalization of the reticulo-hypothalamic system functions. The authors also indicate a necessity of an early screening of the patients with vegetative-vascular dystonia.