Is the time irreversibility of heart rate present even in newborns?

Author

Czippelova, Barbora ; Chladekova, Lenka ; Uhrikova, Zuzana ; Zibolen, Mirko ; Javorka, Kamil ; Javorka, Michal

Author_Institution

Dept. of Physiol., Comenius Univ., Martin, Slovakia

fYear

2014

fDate

25-28 May 2014

Firstpage

15

Lastpage

16

Abstract

The aim of our research was to verify if the time irreversibility of heart rate oscillations exists even in the newborns. Multiscale irreversibility indices (Porta´s index P%, Guzik index G% and Ehlers index E) of the heart rate signals were computed in 20 healthy neonates. The presence of irreversibility and its origin in system nonlinearity was assessed by surrogate data analysis. The results were compared to irreversibility analysis of young adult heart rate signals. Surrogate data analysis revealed asymmetrical nature of the series present already in the neonatal age. Moreover Porta´s irreversibility index P% was significantly higher in newborns compared to adults indicating a shift in the sympatho-vagal balance in newborns towards sympathetic activity. The results of surrogate data analysis suggest an existence of the cardiovascular control system related time irreversibility in the majority of the recordings in both neonatal and adult groups.

Keywords

cardiovascular system; data analysis; electrocardiography; medical signal processing; paediatrics; ECG; Ehlers index; Guzik index; Porta index; cardiovascular control system; healthy neonates; heart rate oscillations; multiscale irreversibility indices; newborns; surrogate data analysis; sympatho-vagal balance; time irreversibility; young adult heart rate signals; Data analysis; Heart rate variability; Indexes; Oscillators; Pediatrics; Time series analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Cardiovascular Oscillations (ESGCO), 2014 8th Conference of the European Study Group on

Conference_Location

Trento

Type

conf

DOI

10.1109/ESGCO.2014.6847496

Filename

6847496