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.
BACKGROUND: Obesity causes changes in cardiac autonomic modulation. OBJECTIVE: To investigate the autonomic modulation of eutrophic and obesechildren 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 obesechildren, 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 obesechildren, revealed a smaller dispersion of RR intervals both beat-to-beat, and in the long term, indicating lower HRV. CONCLUSION:Obesechildren presented changes in the autonomic nervous system characterized by decreases in parasympathetic activity and overall variability.
Authors: Marianne P da C de Rezende Barbosa; Luiz C M Vanderlei; Lucas M Neves; Carolina Takahashi; Paula R Dos S Torquato; Ana Claúdia de S Fortaleza; Ismael F Freitas Júnior; Isabel C E Sorpreso; Luiz C Abreu; Andrés R Pérez Riera Journal: Ann Noninvasive Electrocardiol Date: 2017-07-25 Impact factor: 1.468
Authors: Juliana Regis da Costa E Oliveira; Luis Henrique Base; Laura Cristina Pereira Maia; Jennifer Yohanna Ferreira Ferreira de Lima Antão; Luiz Carlos de Abreu; Fernando Rocha Oliveira; Luiz Carlos Marques Vanderlei; Celso Ferreira Filho; Celso Ferreira Journal: Environ Sci Pollut Res Int Date: 2019-12-11 Impact factor: 4.223
Authors: Levente Kovács; Fruzsina Luca Kézér; Viktor Jurkovich; Margit Kulcsár-Huszenicza; János Tőzsér Journal: PLoS One Date: 2015-08-13 Impact factor: 3.240