Chaotic global parameters correlation with heart rate variability in obese children

Autores

  • Franciele M. Vanderlei Univ Estadual Paulista - Presidente Prudente, Sao Paulo
  • Luiz Carlos M. Vanderlei Univ Estadual Paulista - Presidente Prudente, Sao Paulo
  • David M. Garner Faculty of Health and Life Sciences, Oxford Brookes University, Gipsy Lane, Oxford

DOI:

https://doi.org/10.7322/jhgd.72041

Palavras-chave:

principal component analysis, electrocardiography, nonlinear dynamics

Resumo

The aim of the study is to analyze heart rate dynamics in obese children by measures of HRV. HRV is a simple and non-invasive measure of autonomic impulses. 94 children of mixed gender aged eight to twelve years were divided into two equal groups based on body mass index: obese and normal weight range. HRV was monitored in the dorsal decubitus position for 20 minutes. After tests of normality, Kruskal Wallis was applied for the statistical analysis, with the level of significance set at (p < 0.05). Regarding the application of Principal Component Analysis the first two components represent 99.4% of total variance. The obese children exhibited in heart frequency dynamics associated to an increase in the Chaos Forward Parameter. The Chaos Forward Parameter which applies all three chaotic global parameters is suggested to be the most robust algorithm. Obesity in children can be termed a dynamical condition but it increases the chaotic response.

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Biografia do Autor

  • Franciele M. Vanderlei, Univ Estadual Paulista - Presidente Prudente, Sao Paulo
    Department of Physiotherapy, UNESP - Univ Estadual Paulista - Presidente Prudente, Sao Paulo, Brazil.
  • Luiz Carlos M. Vanderlei, Univ Estadual Paulista - Presidente Prudente, Sao Paulo
    Department of Physiotherapy, UNESP - Univ Estadual Paulista - Presidente Prudente, Sao Paulo, Brazil.
  • David M. Garner, Faculty of Health and Life Sciences, Oxford Brookes University, Gipsy Lane, Oxford
    Department of Biological and Medical Sciences, Faculty of Health and Life Sciences, Oxford Brookes University, Gipsy Lane, Oxford OX3 0BP, United Kingdom

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Publicado

2014-02-01

Edição

v. 24 n. 1 (2014)

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Artigos Originais

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