Heart rate variability in Taiwanese obese children

Chen Chung Fu, Yin Ming Li, Dee Pei, Chien Lin Chen, Huey Ming Lo, Du An Wu, Terry B J Kuo

研究成果: 雜誌貢獻文章

3 引文 斯高帕斯(Scopus)

摘要

Objective: The primary purpose of the present community-based study was to investigate early changes in cardiac autonomic function in obese children. Materials and Methods: A survey of juvenile obesity in Hualien in eastern Taiwan was performed in 2002. A total of 1,724 adolescents who were 12 or 13 years old were recruited. The overall prevalences of normal weight, overweight and obese adolescents were 71.5% 13.1%, and 15.4%, respectively. A stratified random sampling scheme was performed. We selected 100, 50 and 75 subjects from the above-mentioned three groups, and invited them to join this study. Totally, 170 students (normal-weight: overweight: obese= 81: 34: 55) participated in this study. They received blood checks and a heart rate variability (HRV) examination. The homeostasis model assessment of insulin resistance (HOMA-IR) was used to evaluate insulin sensitivity. Results: Compared with the normal-weight group, the obese children had significantly elevated body mass indexes (BMI), HOMA-IR, and systolic and diastolic blood pressure levels. In addition, compared to their normal weight counterparts, obese children had significantly reduced high-frequency power (HF) but elevated low-frequency power in normalized units (LF %), and elevated ratios of low-frequency power to high-frequency power (LF/HF ratio). Further analyses revealed that compared with the normal weight counterparts; obese boys had significantly reduced HF but elevated LF % and LF/HF ratios. Among obese girls, the HF was reduced significantly, and LF% and the LF/HF ratio were increased, though not significantly. In stepwise multiple regression analysis, the BMI and heart rate were negatively associated with the HF component and positively associated with the LF/HF ratio and LF %. For every 1 kg/m2 increment in the BMI, the LF/HF ratio and LF % components of HRV increased ln(0.02) and 0.42% respectively, while HF decreased 0.03 ln(ms2). Boys had a higher LF/HF ratio and LF % than girls. Conclusions: The obese boys and girls had increased insulin resistance and changes in autonomic nervous function that included reduced parasympathetic control and obese boys had elevated sympathovagal modulation. Gender-related autonomic differences, such as girls having lower sympathetic modulations of HRV, were also noted.
原文英語
期刊Tzu Chi Medical Journal
18
發行號3
出版狀態已發佈 - 六月 2006
對外發佈Yes

ASJC Scopus subject areas

  • Medicine(all)

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  • 引用此

    Fu, C. C., Li, Y. M., Pei, D., Chen, C. L., Lo, H. M., Wu, D. A., & Kuo, T. B. J. (2006). Heart rate variability in Taiwanese obese children. Tzu Chi Medical Journal, 18(3).