| Full text | |
| Author(s): |
Marques Vanderlei, Luiz Carlos
[1]
;
Pastre, Carlos Marcelo
[1]
;
Freitas Junior, Ismael Forte
[2]
;
de Godoy, Moacir Fernandes
[3]
Total Authors: 4
|
| Affiliation: | [1] Univ Estadual Paulista, UNESP, Fac Ciencias & Tecnol, Dept Fisioterapia, BR-19060900 Presidente Prudente, SP - Brazil
[2] Univ Estadual Paulista, UNESP, Fac Ciencias & Tecnol, Dept Educ Fis, Sao Paulo - Brazil
[3] Fac Med Sao Jose Rio Preto, Dept Cardiol & Cirurgia Cardiovasc, Sao Paulo - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Arquivos Brasileiros de Cardiologia; v. 95, n. 1, p. 35-40, JUL 10 2010. |
| Web of Science Citations: | 29 |
| Abstract | |
BACKGROUND: Obesity causes changes in cardiac autonomic modulation. OBJECTIVE: To investigate the autonomic modulation of eutrophic and obese children by means of indexes of heart rate variability (HRV) obtained through geometric methods. METHODS: We analyzed data from 133 children aged 8 to 13, divided into two groups: obese (n = 61) and eutrophic (n = 72) according to body mass index for age and sex. For the analysis of HRV, heart rate was recorded beat-to-beat. The RR intervals were transformed into geometric figures, and from them, we calculated the triangular index (RRtri), triangular interpolation of RR intervals (TINN), the indexes SD1, SD2 and SD1/SD2 ratio, obtained from the Poincaré plot. Visual analysis of the plot was also performed. Student's t test was performed for unpaired data and Mann-Whitney's test, with significance level of 5.0%, for data analysis. RESULTS: In obese children, RRtri indexes were proven to be reduced (0.0730 vs 0.1084 [median]), TINN (171.80 ± 55.08 vs 218.26 ± 51.12), SD1 (19.93 ± 9.10 vs 24.10 ± 8.03) and SD2 (51.63 ± 16.53 vs 69.78 ± 17.19). The SD1/SD2 ratio showed no significant differences (0.3781 ± 0.12 vs 0.3467 ± 0.08). Visual analysis of the plot, in obese children, revealed a smaller dispersion of RR intervals both beat-to-beat, and in the long term, indicating lower HRV. CONCLUSION: Obese children presented changes in the autonomic nervous system characterized by decreases in parasympathetic activity and overall variability. (AU) | |
| FAPESP's process: | 08/05414-0 - Analysis of heart rate variability indices in obese children |
| Grantee: | Luiz Carlos Marques Vanderlei |
| Support Opportunities: | Regular Research Grants |