I. A. Pogonysheva, I. I. Lunyak, D.A. Pogonyshev

Seasonal microalternations of ECG signal in students of a northern university

Abstract:

The research addresses the seasonal dynamics of electrophysiological properties of the myocardium in students who live and study in the Khanty-Mansi Autonomous Okrug –Yugra, Russia. The main method of the research was the dispersion mapping of low-amplitude cardio cycle oscillations. The indicators of the electrophysiological properties of the myocardium were recorded in the Human Ecology Laboratory of Nizhnevartovsk State University using the CardioVisor-06s computer-based heart screening system. Eighty 2nd and 3rd year students participated in the research. Mi-croalternations of the ECG signal were recorded four times per year, once in each season. The electrophysiological activity of the myocardium was analyzed and showed seasonal dynamics. The myocardial microalternation index and the Rhythm indicator increased from summer to winter and reached maximum in spring. Increased integral indicators of dispersion mapping in spring may indicate the climatic impact. The transitional sea-son puts greater stress on the functional reserves of the body, which was manifested by the observed alternations in the electrophysiological activity of the myocardium. The maximum heart rates in spring indicate a lower efficiency of the heart muscle and the exhaustion of the chronotropic reserve. The increased values of the Rhythm indicator also point to greater tension in the regulatory system in the cold seasons. At the end of winter and in spring, the myocardial activity in students of Nizhnevartovsk State University reached the upper limit of the physiological norm and their functional re-serves were reduced.

About the autors:

Pogonysheva Irina Alexandrovna, ORCID: 0000-0002-5759-0270, Ph.D., Nizhnevartovsk State University, Nizhnevartovsk, Russia, severina.i@bk.ru; Lunyak Inna Igorevna, ORCID: 0000-0003-3479-9829, Nizhnevartovsk State University, Nizhnevartovsk, Russia, luniak_inna@mail.ru; Pogonyshev Denis Alexandrovich, ORCID: 0000-0001-8815-1556, Ph.D., Nizhnevartovsk State University, Nizhnevartovsk, Russia, d.pogonyshev@mail.ru.

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Key words:

students; seasonal dynamics; dispersion mapping; ECG signal; ECG microalternations; electrophysiological properties; myocardium