CARDIAC FUNCTION OF ATHLETES IN THE NORTH

36 athletes aged 14-22 were studied. Girls are 38,9 %, boys ? 61,1 %. The results of daily ECG monitoring detected wandering pacemaker at 48,6 %, rare auricular extrasystole at 65,7 %, rare monomorphic ventricular premature beats at 51,4 % and frequent ventricular premature beats at 11,4 %. According to Lown criteria of ventricular prema-ture beats, the most frequent are 1 ? gradation (68 %), 2 ? gradation (9,1 %), criteria 3, 4, 5 were detected equally (4,5 %). It should be noted that frequent ventricular premature beats were caused by physical training. Delayed con-duction was revealed at 11,4 % athletes, 2nd grade atrio-ventricular block of 1st and 2nd types was detected equally at 8,6 % athletes.