Description:
One of the most important problems of ecological age physiology is studying of development of cardiovascular system of the person at all stages онтогенеза in various ekologo-geographical conditions. Functional indicators most intensively change during organism growth, that is from the birth before complete physical maturing. Work purpose: to study character and features of adaptive reactions of cardiovascular system of an organism of children of 7-17 years which were born, living and being trained in hypocomfortable climatic conditions of Yugra. Materials and research methods. The assessment of a functional condition of cardiovascular system was carried out at 413 school students of a radical nationality hant (wood), coming for academic year to boarding schools. From among the surveyed school students two groups of children on a sex were created. In each sexual group it was in addition allocated on three age groups (7-10 the-junior school age, 1114 - middle school age and 15-17 years the-senior school age). Results. Various age dynamics of excitability of a myocardium of auricles and ventricles at school students hant of 7-17 years is established. At girls hant at younger school age indicators showed higher, than at boys excitability of a myocardium of auricles and its progressive decrease by 15-17 years. At boys hant the return tendency is noted. Function of excitability of a myocardium of ventricles prevailed at boys as at 11-14, and 15-17 years (R <0,05). Duration of atrioventricular conductivity actively decreased by 15-17 years in both sexual groups, but girls hant on an AV hub had a speed of carrying out excitement slightly more slowly.