@article{ref1,
title="Evaluation of cardiac autonomic function using heart rate variability in children with acute carbon monoxide poisoning",
journal="Cardiology in the young",
year="2017",
author="Vural, Cagdas and Dinleyici, Ener Cagri and Kosger, Pelin and Bolluk, Ozge and Kilic, Zubeyir and Ucar, Birsen",
volume="27",
number="9",
pages="1662-1669",
abstract="Introduction Carbon monoxide poisoning may cause myocardial toxicity and cardiac autonomic dysfunction, which may contribute to the development of life-threatening arrhythmias. We investigated the potential association between acute carbon monoxide exposure and cardiac autonomic function measured by heart rate variability. <br><br>METHOD: The present study included 40 children aged 1-17 years who were admitted to the Pediatric Intensive Care Unit with acute carbon monoxide poisoning and 40 healthy age- and sex-matched controls. Carboxyhaemoglobin and cardiac enzymes were measured at admission. Electrocardiography was performed on admission and discharge, and 24-hour Holter electrocardiography was digitally recorded. Heart rate variability was analysed at both time points - 24-hour recordings - and frequency domains - from the first 5 minutes of intensive care unit admission. <br><br>RESULTS: Time domain and frequency indices such as high-frequency spectral power and low-frequency spectral power were similar between patient and control groups (p>0.05). The ratio of low-frequency spectral power to high-frequency spectral power was significantly lower in the carbon monoxide poisoning group (p<0.001) and was negatively correlated with carboxyhaemoglobin levels (r=-0.351, p<0.05). The mean heart rate, QT dispersion, corrected QT dispersion, and P dispersion values were higher in the carbon monoxide poisoning group (p<0.05) on admission. The QT dispersion and corrected QT dispersion remained longer in the carbon monoxide poisoning group compared with controls on discharge (p<0.05). <br><br>CONCLUSION: The frequency domain indices, especially the ratio of low-frequency spectral power to high-frequency spectral power, are useful for the evaluation of the cardiac autonomic function. The decreased low-frequency spectral power-to-high-frequency spectral power ratio reflects a balance of the autonomic nervous system, which shifted to parasympathetic components.<p /> <p>Language: en</p>",
language="en",
issn="1047-9511",
doi="10.1017/S1047951117000944",
url="http://dx.doi.org/10.1017/S1047951117000944"
}