Abstract
Cardiorespiratory system activities have been studied on rats in experiment after oral introduction of the new selenium-containing metal-complex substance πQ1983 in dose 100 mg/kg before and under action of acute hypercapnic hypoxia (AH + Hc). The substance was introduced 90 min. before (incubation period) placement of animals into hypoxic chambers with 1.0 L free volume. During each experiment as well as during AH+Hc an electrical activity of myocardium (ECG) and respiration curves called pneumobarogramm (PBG) were recorded simultaneously. It has been established that the substance πQ1983 made cardiodepressive effect and decreases parameters of lungs ventilation in animals. According to ECG and PBG dynamics, rats protected by the substance demonstrated a high resistance level to the aroused acute hypoxia with hypercapnia, that expressed by weakening of early reactions from cardiorespiratory system under hypercapnia action, and by twice longer life span of animals in hypoxic experiment.
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