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AGE FEATURES OF THE CARDIOVASCULAR SYSTEM RESPONSE TO THE GEOMAGNETIC ACTIVITY IN SUBAURORAL AREA
Abstract
The aim of the research is to reveal age features of the response of healthy volunteers' cardiovascular system to the geomagnetic activity in subauroral area (Yakutsk). To achieve this goal, in 2014, March - April, during 60 days there has been holding a daily monitoring of the condition of the cardiovascular system of the healthy volunteers. There were 2 groups of them. In the 1st group there were medical students of an average age 22,3±1,7 years old (16 persons). The 2nd group contained members of the Y.G. Shafer Institute of Cosmophysical Research (17 persons), average age - 47,6±4,4 years. To estimate the condition of the cardiovascular system there had been used an electrocardiogram phase image, which was done by the express cardiograph "Fazagraf". T-wave symmetry coefficient has been analyzed (TSC), which characterized processes of the myocard repolarization. Geomagnetic activity has been estimated by the daily Kp-index parameter. In both of the groups there have been determined the coincidence of the maximums of Kp and TSC, average values of TSC, as for the whole period of the observation, as separately - on the period of weak and intensive geomagnetic activity. It was found that in the both groups TSC parameters were no higher than the norm, which is typical to healthy volunteers. At the same time, in the 1st group, the TSC parameter was statistically higher than the same for the group 2 (0,682±0,006 and 0,563±0,007 respectively, p<0,05), and this shows more evident electrophysiological changes in myocard in young volunteers in subauroral area. The revealed features did not depend on neither weak (from the 1st to the 40th day of the monitoring, Kp=12,0±0,5) nor intensive (from the 41th to the 60th day, Kp=18,0±1,1; p<0,05) geomagnetic activity. TSC of the volunteers from the 1st group was higher than the TSC of the 2nd group on the period of both weak (0,668±0,006 and 0,555±0,010 respectively, p<0,05) and intensive (0,710±0,012 and 0,574±0,0001 respectively, p<0,05) geomagnetic activity. As can be seen from the above, the condition of myocard of healthy volunteers in the subauroral area is steadily characterized by more evident electrophysiological changes in myocard, then in the volunteers of average age, and this fact is noticed as on the weak periods as on the intensive periods of geomagnetic activity. The given results display that in subauroral area in healthy volunteers electrophysiological processes in myocard stabilize to the average age on more favorable condition, which does not change independently of investigated conditions of the geomagnetic activity. The data of the research develop the knowledge of the features of adaptation of the cardiovascular system to geomagnetic activity in inhabitants of the subauroral area of various age groups.
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