The activity of sympathyco-adrenal, and of serotonin-hystain-cholinergic systems was studied in 34 patients operated for the ischemic heart disease without extracorporeal blood circulation. A moderate increase of parameters characterizing the condition of sympathyco-adrenal, and of serotonin-hystain-cholinergic systems was noted in patients in the perioperative period. The activity of the studied systems reduced due to a total anesthetization. At the same time, the activation of the factors of the neurohumoral system was limited by the adaptation norms with sufficient reserves being preserved.
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