ELECTROCARDIOGRAM ELEMENTS DURATION IN CHILDREN OF 6–7 YEARS OLD AFTER TEST MARTINE
Results of electrocardiogram (ECG) measures in 15 apparently healthy 6–7 years old children before and after Martine test are presented. Objective – to study the duration of intervals PP, PT, segment TP and their change under influence of functional test Martinе, and to determine the dependence of the results upon the largest and smallest values of heart rate in control. When the test Martine increases heart rate up to 38 %, almost at the initial level is the duration of interval PT (difference 5 %), the PP interval is reduced by 17 %, the most significant decrease in the duration – up 100 % segment TP is detected. It can be concluded that the lowest variability has a PT interval, and the highest – TP. For children 6–7 years have seen the same pattern as that of the adults: the higher heart rate in response to a functional load, the bigger proportion of atrioventricular РT complex and smaller share of diastolic TP.