Testing heart rate asymmetry in long, nonstationary 24 hour RR-interval time series

Objective : Heart rate asymmetry is a phenomenon in which the contribution of heart rate
decelerations to short-term heart rate variability is greater than that of accelerations, and the
contribution of accelerations to long-term and total variability is greater than that of
decelerations. This has been established for short, stationary recordings, so our aim is to do it
for long recordings. Approach : In this paper, we analyze heart rate asymmetry in 87 long, 24  h
electrocardiogram Holter recordings from healthy people. We show that in the whole recording all
types of asymmetry are observable, clear and highly statistically significant. To analyze the local
changes of asymmetry in time, we analyzed the recordings by disjoint jumping windows of 300 beats.
Main results : This analysis revealed that the local, averaged measures of all types of asymmetry
also demonstrate its presence which is highly statistically significant. Additionally, we introduce
in this pa...

Source: Physiological Measurement - October 29, 2019 Category: Physiology Authors: J Piskorski, J Ellert, T Krauze, W Grabowski, A Wykretowicz and P Guzik Source Type: research