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Measuring Cardiac Autonomic Nervous System (ANS) Activity in Children
Published on: April 29, 2013
Cardiac autonomic functions in obese children
Mehmet Emre Taşçılar1, Mehmet Yokuşoğlu, Mehmet Boyraz
1Department of Pediatrics Division of Endocrinology, Gulhane Military Medical Academy, Ankara, Turkey.
Journal of Clinical Research in Pediatric Endocrinology
|July 14, 2011
Summary
Obese children show reduced heart rate variability (HRV), indicating autonomic imbalance. This autonomic dysfunction is more pronounced in insulin-resistant obese children, suggesting a role in pediatric obesity pathogenesis.
Area of Science:
- Pediatric Endocrinology
- Autonomic Nervous System Function
- Cardiovascular Physiology
Background:
- The autonomic nervous system (ANS) plays a role in obesity pathophysiology.
- Assessing ANS function through heart rate variability (HRV) is crucial in pediatric populations.
Purpose of the Study:
- To evaluate autonomic system function in obese children using HRV.
- To compare HRV parameters between obese and healthy children.
- To investigate the association between insulin resistance and HRV in obese children.
Main Methods:
- Thirty-two obese and 30 healthy children (mean age ~11 years) were enrolled.
- Obesity defined by BMI >97th percentile; participants were disease- and medication-free.
- Twenty-four-hour ambulatory ECG recordings analyzed for time- and frequency-domain HRV indices; HOMA-IR used for insulin resistance assessment.
Main Results:
- Obese children exhibited significantly decreased HRV compared to controls across time- and frequency-domain parameters.
- Insulin-resistant obese children showed a marked reduction in all HRV parameters compared to non-insulin-resistant obese children.
Conclusions:
- Decreased HRV in obese children suggests parasympathetic withdrawal and sympathetic predominance.
- Autonomic imbalance, particularly linked to insulin resistance, may contribute to the pathogenesis of childhood obesity.
- HRV analysis provides insights into ANS dysfunction in pediatric obesity.
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