S.A. IVYANSKY, L.A. BALYKOVA, A.N. URZYAEVA, L.S. ZAGRYADSKAYA, Yu.O. SOLDATOV, A.V. SAMARIN
Mordovian State University named after N.P. Ogarev, Saransk
Children Republican Clinical Hospital of the Ministry of Health of the Republic of Mordovia, Saransk
Republican medical exercises dispensary of the Ministry of Health of the Republic of Mordovia, Saransk

Ivyansky Stanislav Aleksandrovich
Senior Lecturer of the Department of Pediatrics of Medical Institute Mordovia State University named after N.P . Ogarev
15 Rozy Luksemburg Str., Saransk 430032
tel. (8342) 35-30-02, e-mail: stivdoctor@yandex.ru

The article gives the results of electrocardiography of 198 children 10-15 years old, playing football and tennis with sports experience of 2-5 years (group of initial training) and 5-7 years (group of special athletic training). It was found that the level of the average heart rate of the athletes is different from the corresponding figure of those not involved in sports after 5 years of regular exercise; the level of the minimum heart rate of athletes is at a comparable value. Were set the limits of the interval length QTc (460-480 ms), requiring additional diagnostic procedures. ECG changes that require further investigation (bradycardia less than 2%, AV-block II degree, ST-T changes, arrhythmias, QTc interval prolongation above 460-480 msec) were recorded in 4.9% of cases in the group of initial training and 9% in the group of special sports training.

Key words: young athletes, ECG, heart rate, QT duration, desadaptation sings.

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