Abstract

TRIVINO, Lisbeth; AVILA, Juan C.  and  RAMIREZ-VELEZ, Robinson. The paradox of obesity and its relationship to cardiorespiratory fitness in patients with heart failure. Rev. Colomb. Cardiol. [online]. 2015, vol.22, n.5, pp.218-223. ISSN 0120-5633.  https://doi.org/10.1016/j.rccar.2015.05.004.

Background:Although body mass index (BMI) is associated with improved outcomes in established heart failure (HF), the impact of cardiorespiratory fitness on the obesity paradox is less clear. Objective: The aim of this study was to evaluate the relationship between body mass index and cardiorespiratory fitness in terms of VO₂ max in patients with HF. Material and methods: A cross-sectional descriptive study was conducted on 40 patients with HF (age 66.8 ± 11.4 years, BMI 27.4 ± 4.8 kg·m^-1, LVEF 40.5 ± 8.3%). BMI was measured as an indicator of obesity and the risk was classified according to international benchmarks. Cardiorespiratory fitness, measured using the 6-min walk test (6'WT), oxygen consumption by VO(2)max, the distance and the number of steps, were grouped and compared with the body mass index reference values. Results: In subjects with BMI ≥ 25 kg·m^-1, negative correlations were observed in the distance by 6'WT (rho = -0.50), number of steps (rho = -0.45), VO(2)max (rho = -0.49), and LVEF (rho = -0.32). Conclusion: This study suggests that higher body mass index values, "obesity paradox", are not associated with a higher cardiorespiratory level using VO(2)max.

Keywords : Heart failure; Obesity; Exercise.

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