Heart rate variability in students' daily monitoring of ECG

Abstract

In this paper we present data on the parameters of heart rate variability in Holter ECG of girls, the high school students. ECG monitoring was done for the students of each of them twice: during the usual school days, and in the annual exam days. From 9 HRV parameters were found statistically significant differences in four of them: NN,SDNNidx, rMSSD, NN50, pNN50. The greatest significance of changes in HRV parameters observed for a number of indicators in the night. This data shows a predominance of sympathetic activity in the examination period, expressed in the night