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Cardiology Research and Practice
Volume 2013, Article ID 196506, 7 pages
http://dx.doi.org/10.1155/2013/196506
Clinical Study

Heart Rate Variability in Children with Tricyclic Antidepressant Intoxication

1Department of Pediatric Intensive Care, Faculty of Medicine, Eskişehir Osmangazi University, 26480 Eskişehir, Turkey
2Pediatric Intensive Care Unit, Faculty of Medicine, Eskişehir Osmangazi University, 26480 Eskişehir, Turkey
3Department of Pediatric Cardiology, Faculty of Medicine, Eskişehir Osmangazi University, 26480 Eskişehir, Turkey
4Department of Pediatrics, Faculty of Medicine, Eskişehir Osmangazi University, 26480 Eskişehir, Turkey

Received 15 December 2012; Revised 5 February 2013; Accepted 13 February 2013

Academic Editor: Gavin W. Lambert

Copyright © 2013 Ener Cagri Dinleyici et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The aim of this study was to evaluate HRV in children requiring intensive care unit stays due to TCA poisoning between March 2009 and July 2010. In the time-domain nonspectral evaluation, the SDNN ( ), SDNNi ( ), RMSDD ( ), and pNN50 ( ) were found to be significantly lower in the TCA intoxication group. The spectral analysis of the data recorded during the first 5 minutes after intensive care unit admission showed that the values of the nLF ( ) and the LF/HF ratio ( ) were significantly higher in the TCA intoxication group, while the nHF ( ) values were significantly lower. The frequency-domain spectral analysis of the data recorded during the last 5 minutes showed a lower nHF ( ) in the TCA intoxication group than in the controls, and the LF/HF ratio was significantly higher ( ) in the intoxication group. The LF/HF ratio was higher in the seven children with seizures ( ). These findings provided us with a starting point for the value of HRV analysis in determining the risk of arrhythmia and convulsion in TCA poisoning patients. HRV can be used as a noninvasive testing method in determining the treatment and prognosis of TCA poisoning patients.