Correlation between heart rate variability indexes and aerobic physiological variables in patients with COPD
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Data
2015-02-01
Autores
Leite, Marceli R. [UNESP]
Ramos, Ercy Mara C. [UNESP]
Kalva-Filho, Carlos A. [UNESP]
Rodrigues, Fernanda Maria M. [UNESP]
Freire, Ana Paula C. F. [UNESP]
Tacao, Guilherme Y. [UNESP]
Toledo, Alessandra C. de
Cecilio, Michel J.
Vanderlei, Luiz Carlos M. [UNESP]
Ramos, Dionei [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Wiley-Blackwell
Resumo
Background and objectivePrevious studies have shown a relationship between the level of physical fitness and autonomic variables. However, these relationships have not been investigated in patients with chronic obstructive pulmonary disease (COPD). The objective of this study was to correlate the resting heart rate variability (HRV) indexes with aerobic physiological variables obtained at a maximal exercise test in patients with COPD.MethodsThirty-seven patients with COPD (63 (59-70) years; 46 (35.4-63.7) forced expiratory volume in 1 s (FEV1)%) underwent assessment of autonomic modulation at rest for 20min to determine the HRV indexes in time and frequency domains. Soon after that, the patients performed an incremental exercise test to determine the anaerobic threshold (GET), the peak oxygen uptake (VO2PEAK) and the velocity corresponding to VO2PEAK (vVO(2PEAK)).ResultsThe indexes that express parasympathetic component as RMSSD (11.4 [7.5-23.8], HF (ms(2)) (35 [17-195] and SD1 (8.1 [5.3-16.8]), correlated with GET (r=0.39; r=0.43; r=0.39 respectively). The indexes that represent the overall variability, SDNN (19.5 [13.9-28.8]), LF (ms(2)) (111 [38-229]), and SD2 (26.8 [18.6-35.4]) correlated with vVO(2PEAK) (r=0.37; r=0.38; r=0.37; r=0.44; r=0.43; r=0.46 respectively). Likewise, the indexes LF (ms(2)), LF (nu) (63.2 [46-77,9]), HF (nu) (36.8 [22.1-54]), and LF/HF (1.7 [0.9-3.5]) correlated with VO2PEAK (r=0.35; r=0.35; r=-0.35; r=0.40 respectively).ConclusionsThis study demonstrated that HRV indexes at rest may become a predictive tool for aerobic capacity in COPD patients after the development of more consistent methods.This study aimed to investigate whether the HRV indexes correlate with aerobic physiological variables obtained in cardiopulmonary exercise testing of patients with COPD. Such correlation would have important clinical implications as it would allow, prior to the realization of the maximal exercise testing, to infer the patient's aerobic capacity.
Descrição
Palavras-chave
Aerobic treatment, Autonomic nervous system, Parasympathetic nervous system, Physical fitness, Pulmonary disease
Como citar
Respirology. Hoboken: Wiley-blackwell, v. 20, n. 2, p. 273-278, 2015.