TY  - JOUR
AU  - Bjelaković, Bojko
AU  - Ilić, Stevan
AU  - Chouliaras, Konstantinos
AU  - Milovanović, Branislav
AU  - Vukomanović, Vladislav
AU  - Bojić, Tijana
AU  - Bjelaković, Ljiljana
AU  - Zaharov, Tatjana
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8868
AB  - Ventricular arrhythmias (VAs) are common pediatric rhythm disorders requiring comprehensive laboratory evaluation. Although usually idiopathic, implying a benign character and favorable prognosis, the initial clinical approach is still not established in all cases. Considering their prognostic significance, exercise-induced (precipitated or aggravated) VAs usually require additional diagnostics, treatment, and follow-up. A number of reports have presented experimental and clinical evidence that increased sympathetic activity can initiate, or at least facilitate, VAs. Recent data highlight the relationship between exercise-induced idiopathic VAs (IVAs) and the long-term risk of cardiovascular death. The aim of this study was to assess the utility of heart rate variability (HRV) analysis as a noninvasive method for estimating autonomic nervous activity in children with exerciseinduced IVAs. The study included 42 children with IVAs, who were divided into two groups: children with exerciseinduced (precipitated or aggravated) IVAs and children with exercised-suppressed IVAs. Time-domain HRV parameters were analyzed from 24-h ambulatory electrocardiography recordings, and the majority of children underwent an exercise stress test using the McMaster protocol. The results of this study showed no significant changes in parasympathetic index, i.e., the square root of the mean of the sum of the squares of the differences between adjacent NN intervals (the length between two successive heartbeats) between the groups examined. On the other hand, we observed diminished time-domain values for the standard deviation of all adjacent NN intervals, as well as diminished time-domain values for standard deviation of the averages of NN intervals in all 5-min segments in the group of children with exercise-induced IVAs, implicating increased sympathetic activity in such individuals. HRV analysis could be a helpful diagnostic method, giving useful information regarding cardiac autonomic control in some children with exercise-induced IVAs. © Springer Science+Business Media, LLC 2009.
T2  - Pediatric Cardiology
T1  - Heart Rate Variability in Children with Exercise-Induced Idiopathic Ventricular Arrhythmias
VL  - 31
IS  - 2
SP  - 188
EP  - 194
DO  - 10.1007/s00246-009-9582-3
ER  - 

@article{
author = "Bjelaković, Bojko and Ilić, Stevan and Chouliaras, Konstantinos and Milovanović, Branislav and Vukomanović, Vladislav and Bojić, Tijana and Bjelaković, Ljiljana and Zaharov, Tatjana",
year = "2010",
abstract = "Ventricular arrhythmias (VAs) are common pediatric rhythm disorders requiring comprehensive laboratory evaluation. Although usually idiopathic, implying a benign character and favorable prognosis, the initial clinical approach is still not established in all cases. Considering their prognostic significance, exercise-induced (precipitated or aggravated) VAs usually require additional diagnostics, treatment, and follow-up. A number of reports have presented experimental and clinical evidence that increased sympathetic activity can initiate, or at least facilitate, VAs. Recent data highlight the relationship between exercise-induced idiopathic VAs (IVAs) and the long-term risk of cardiovascular death. The aim of this study was to assess the utility of heart rate variability (HRV) analysis as a noninvasive method for estimating autonomic nervous activity in children with exerciseinduced IVAs. The study included 42 children with IVAs, who were divided into two groups: children with exerciseinduced (precipitated or aggravated) IVAs and children with exercised-suppressed IVAs. Time-domain HRV parameters were analyzed from 24-h ambulatory electrocardiography recordings, and the majority of children underwent an exercise stress test using the McMaster protocol. The results of this study showed no significant changes in parasympathetic index, i.e., the square root of the mean of the sum of the squares of the differences between adjacent NN intervals (the length between two successive heartbeats) between the groups examined. On the other hand, we observed diminished time-domain values for the standard deviation of all adjacent NN intervals, as well as diminished time-domain values for standard deviation of the averages of NN intervals in all 5-min segments in the group of children with exercise-induced IVAs, implicating increased sympathetic activity in such individuals. HRV analysis could be a helpful diagnostic method, giving useful information regarding cardiac autonomic control in some children with exercise-induced IVAs. © Springer Science+Business Media, LLC 2009.",
journal = "Pediatric Cardiology",
title = "Heart Rate Variability in Children with Exercise-Induced Idiopathic Ventricular Arrhythmias",
volume = "31",
number = "2",
pages = "188-194",
doi = "10.1007/s00246-009-9582-3"
}

Bjelaković, B., Ilić, S., Chouliaras, K., Milovanović, B., Vukomanović, V., Bojić, T., Bjelaković, L.,& Zaharov, T.. (2010). Heart Rate Variability in Children with Exercise-Induced Idiopathic Ventricular Arrhythmias. in Pediatric Cardiology, 31(2), 188-194.
https://doi.org/10.1007/s00246-009-9582-3

Bjelaković B, Ilić S, Chouliaras K, Milovanović B, Vukomanović V, Bojić T, Bjelaković L, Zaharov T. Heart Rate Variability in Children with Exercise-Induced Idiopathic Ventricular Arrhythmias. in Pediatric Cardiology. 2010;31(2):188-194.
doi:10.1007/s00246-009-9582-3 .

Bjelaković, Bojko, Ilić, Stevan, Chouliaras, Konstantinos, Milovanović, Branislav, Vukomanović, Vladislav, Bojić, Tijana, Bjelaković, Ljiljana, Zaharov, Tatjana, "Heart Rate Variability in Children with Exercise-Induced Idiopathic Ventricular Arrhythmias" in Pediatric Cardiology, 31, no. 2 (2010):188-194,
https://doi.org/10.1007/s00246-009-9582-3 . .