Cardiac autonomic modulation in the supine and standing positions in nonobese, obese and morbidly obese children
DOI:
https://doi.org/10.24220/2318-0897v19n1/6a827Keywords:
Obesity, Autonomic functional test, Heart rate variabilityAbstract
Objective
This study assessed the cardiac autonomic modulation in nonobese, obese and
morbidly obese children by cardiocirculatory stress induced by standing up from
the supine position.
Methods
This cross-sectional study included 30 children aged 9 to 11 years, divided into
three groups: a) nonobese (n=10), b) obese (n=10), c) morbidly obese (n=10),
based on their body mass indices, classified according to the National Center for
Health Statistics table. All of them underwent anthropometric and clinical
assessment, followed by active postural change from the supine heart rate were
monitored and the heart rate variability was analyzed.
Results
All groups presented a significant increase in sympathetic contribution and
decrease in parasympathetic activity when the heart rate in the supine and
standing positions were compared. The delta heart rate differed significantly (0
to 10s of active postural change) between the nonobese (+24.1bpm) and obese
groups (+21.7bpm).
Conclusion
Obesity did not affect the cardiovascular autonomic mechanisms significantly
when the heart rate variability from the supine to the standing position was
compared in nonobese, obese and morbidly obese children.
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References
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