Effects of exercise training on heart rate variability in Chagas heart disease
Heart rate variability (HRV) is a marker of autonomic dysfunction severity. The effects of physical training on HRV indexes in Chagas heart disease (CHD) are not well established. To evaluate the changes in HRV indexes in response to physical training in CHD. Patients with CHD and left ventricular (...
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| Published in: | Arquivos brasileiros de cardiologia Vol. 103; no. 3; pp. 201 - 208 |
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Sociedade Brasileira de Cardiologia
01-09-2014
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| Abstract | Heart rate variability (HRV) is a marker of autonomic dysfunction severity. The effects of physical training on HRV indexes in Chagas heart disease (CHD) are not well established.
To evaluate the changes in HRV indexes in response to physical training in CHD.
Patients with CHD and left ventricular (LV) dysfunction, physically inactive, were randomized either to the intervention (IG, N = 18) or control group (CG, N = 19). The IG participated in a 12-week exercise program consisting of 3 sessions/week.
Mean age was 49.5 ± 8 years, 59% males, mean LVEF was 36.3 ± 7.8%. Baseline HRV indexes were similar between groups. From baseline to follow-up, total power (TP): 1653 (IQ 625 - 3418) to 2794 (1617 - 4452) ms, p = 0.02) and very low frequency power: 586 (290 - 1565) to 815 (610 - 1425) ms, p = 0.047) increased in the IG, but not in the CG. The delta (post - pre) HRV indexes were similar: SDNN 11.5 ± 30.0 vs. 3.7 ± 25.1 ms. p = 0.10; rMSSD 2 (6 - 17) vs. 1 (21 - 9) ms. p = 0.43; TP 943 (731 - 3130) vs. 1780 (921 - 2743) Hz. p = 0.46; low frequency power (LFP) 1.0 (150 - 197) vs. 60 (111 - 146) Hz. p = 0.85; except for high frequency power, which tended to increase in the IG: 42 (133 - 92) vs. 79 (61 - 328) Hz. p = 0.08).
In the studied population, the variation of HRV indexes was similar between the active and inactive groups. Clinical improvement with physical activity seems to be independent from autonomic dysfunction markers in CHD. |
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| AbstractList | Heart rate variability (HRV) is a marker of autonomic dysfunction severity. The effects of physical training on HRV indexes in Chagas heart disease (CHD) are not well established.
To evaluate the changes in HRV indexes in response to physical training in CHD.
Patients with CHD and left ventricular (LV) dysfunction, physically inactive, were randomized either to the intervention (IG, N = 18) or control group (CG, N = 19). The IG participated in a 12-week exercise program consisting of 3 sessions/week.
Mean age was 49.5 ± 8 years, 59% males, mean LVEF was 36.3 ± 7.8%. Baseline HRV indexes were similar between groups. From baseline to follow-up, total power (TP): 1653 (IQ 625 - 3418) to 2794 (1617 - 4452) ms, p = 0.02) and very low frequency power: 586 (290 - 1565) to 815 (610 - 1425) ms, p = 0.047) increased in the IG, but not in the CG. The delta (post - pre) HRV indexes were similar: SDNN 11.5 ± 30.0 vs. 3.7 ± 25.1 ms. p = 0.10; rMSSD 2 (6 - 17) vs. 1 (21 - 9) ms. p = 0.43; TP 943 (731 - 3130) vs. 1780 (921 - 2743) Hz. p = 0.46; low frequency power (LFP) 1.0 (150 - 197) vs. 60 (111 - 146) Hz. p = 0.85; except for high frequency power, which tended to increase in the IG: 42 (133 - 92) vs. 79 (61 - 328) Hz. p = 0.08).
In the studied population, the variation of HRV indexes was similar between the active and inactive groups. Clinical improvement with physical activity seems to be independent from autonomic dysfunction markers in CHD. Background: Heart rate variability (HRV) is a marker of autonomic dysfunction severity. The effects of physical training on HRV indexes in Chagas heart disease (CHD) are not well established. Objective: To evaluate the changes in HRV indexes in response to physical training in CHD. Methods: Patients with CHD and left ventricular (LV) dysfunction, physically inactive, were randomized either to the intervention (IG, N = 18) or control group (CG, N = 19). The IG participated in a 12-week exercise program consisting of 3 sessions/week. Results: Mean age was 49.5 ± 8 years, 59% males, mean LVEF was 36.3 ± 7.8%. Baseline HRV indexes were similar between groups. From baseline to follow-up, total power (TP): 1653 (IQ 625 - 3418) to 2794 (1617 - 4452) ms, p = 0.02) and very low frequency power: 586 (290 - 1565) to 815 (610 - 1425) ms, p = 0.047) increased in the IG, but not in the CG. The delta (post - pre) HRV indexes were similar: SDNN 11.5 ± 30.0 vs. 3.7 ± 25.1 ms. p = 0.10; rMSSD 2 (6 - 17) vs. 1 (21 - 9) ms. p = 0.43; TP 943 (731 - 3130) vs. 1780 (921 - 2743) Hz. p = 0.46; low frequency power (LFP) 1.0 (150 - 197) vs. 60 (111 - 146) Hz. p = 0.85; except for high frequency power, which tended to increase in the IG: 42 (133 - 92) vs. 79 (61 - 328) Hz. p = 0.08). Conclusion: In the studied population, the variation of HRV indexes was similar between the active and inactive groups. Clinical improvement with physical activity seems to be independent from autonomic dysfunction markers in CHD. BACKGROUNDHeart rate variability (HRV) is a marker of autonomic dysfunction severity. The effects of physical training on HRV indexes in Chagas heart disease (CHD) are not well established. OBJECTIVETo evaluate the changes in HRV indexes in response to physical training in CHD. METHODSPatients with CHD and left ventricular (LV) dysfunction, physically inactive, were randomized either to the intervention (IG, N = 18) or control group (CG, N = 19). The IG participated in a 12-week exercise program consisting of 3 sessions/week. RESULTSMean age was 49.5 ± 8 years, 59% males, mean LVEF was 36.3 ± 7.8%. Baseline HRV indexes were similar between groups. From baseline to follow-up, total power (TP): 1653 (IQ 625 - 3418) to 2794 (1617 - 4452) ms, p = 0.02) and very low frequency power: 586 (290 - 1565) to 815 (610 - 1425) ms, p = 0.047) increased in the IG, but not in the CG. The delta (post - pre) HRV indexes were similar: SDNN 11.5 ± 30.0 vs. 3.7 ± 25.1 ms. p = 0.10; rMSSD 2 (6 - 17) vs. 1 (21 - 9) ms. p = 0.43; TP 943 (731 - 3130) vs. 1780 (921 - 2743) Hz. p = 0.46; low frequency power (LFP) 1.0 (150 - 197) vs. 60 (111 - 146) Hz. p = 0.85; except for high frequency power, which tended to increase in the IG: 42 (133 - 92) vs. 79 (61 - 328) Hz. p = 0.08). CONCLUSIONIn the studied population, the variation of HRV indexes was similar between the active and inactive groups. Clinical improvement with physical activity seems to be independent from autonomic dysfunction markers in CHD. |
| Author | Cota, Vitor Emanuel Serafim Nascimento, Bruno Ramos Costa, Henrique Silveira Rocha, Manoel Otávio da Costa Lima, Márcia Maria Oliveira Nunes, Maria do Carmo Pereira Pinto Filho, Marcelo Martins Ribeiro, Antonio Luiz Pinho Alencar, Maria Clara Noman de |
| AuthorAffiliation | 2 Serviço de Cardiologia e Cirurgia Cardiovascular do Hospital das Clínicas da UFMG, Belo Horizonte, MG - Brazil 3 Pós-graduação em Infectologia e Medicina Tropical - Faculdade de Medicina da UFMG, Belo Horizonte, MG - Brazil 4 Escola de Fisioterapia da Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, MG - Brazil 1 Faculdade de Medicina da Universidade Federal de Minas Gerais, Belo Horizonte, MG - Brazil |
| AuthorAffiliation_xml | – name: 3 Pós-graduação em Infectologia e Medicina Tropical - Faculdade de Medicina da UFMG, Belo Horizonte, MG - Brazil – name: 2 Serviço de Cardiologia e Cirurgia Cardiovascular do Hospital das Clínicas da UFMG, Belo Horizonte, MG - Brazil – name: 1 Faculdade de Medicina da Universidade Federal de Minas Gerais, Belo Horizonte, MG - Brazil – name: 4 Escola de Fisioterapia da Universidade Federal dos Vales do Jequitinhonha e Mucuri, Diamantina, MG - Brazil – name: Universidade Federal de Minas Gerais – name: Universidade Federal dos Vales do Jequitinhonha e Mucuri |
| Author_xml | – sequence: 1 givenname: Bruno Ramos surname: Nascimento fullname: Nascimento, Bruno Ramos organization: Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil – sequence: 2 givenname: Márcia Maria Oliveira surname: Lima fullname: Lima, Márcia Maria Oliveira organization: Faculdade de Medicina, UFMG, Belo Horizonte, MG, Brazil – sequence: 3 givenname: Maria do Carmo Pereira surname: Nunes fullname: Nunes, Maria do Carmo Pereira organization: Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil – sequence: 4 givenname: Maria Clara Noman de surname: Alencar fullname: Alencar, Maria Clara Noman de organization: Serviço de Cardiologia e Cirurgia Cardiovascular, Hospital das Clínicas, UFMG, Belo Horizonte, MG, Brazil – sequence: 5 givenname: Henrique Silveira surname: Costa fullname: Costa, Henrique Silveira organization: Faculdade de Medicina, UFMG, Belo Horizonte, MG, Brazil – sequence: 6 givenname: Marcelo Martins surname: Pinto Filho fullname: Pinto Filho, Marcelo Martins organization: Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil – sequence: 7 givenname: Vitor Emanuel Serafim surname: Cota fullname: Cota, Vitor Emanuel Serafim organization: Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil – sequence: 8 givenname: Manoel Otávio da Costa surname: Rocha fullname: Rocha, Manoel Otávio da Costa organization: Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil – sequence: 9 givenname: Antonio Luiz Pinho surname: Ribeiro fullname: Ribeiro, Antonio Luiz Pinho organization: Faculdade de Medicina, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil |
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| Keywords | Chagas Cardiomyopathy Heart Rate Exercício Exercise Cardiomiopatia Chagásica Frequência Cardíaca |
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| Snippet | Heart rate variability (HRV) is a marker of autonomic dysfunction severity. The effects of physical training on HRV indexes in Chagas heart disease (CHD) are... BACKGROUNDHeart rate variability (HRV) is a marker of autonomic dysfunction severity. The effects of physical training on HRV indexes in Chagas heart disease... Background: Heart rate variability (HRV) is a marker of autonomic dysfunction severity. The effects of physical training on HRV indexes in Chagas heart disease... |
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| SubjectTerms | Adult CARDIAC & CARDIOVASCULAR SYSTEMS Cardiomiopatia Chagásica Chagas Disease - physiopathology Chagas Disease - therapy Exercise - physiology Exercise Test Exercise Therapy - methods Exercício Female Frequência Cardíaca Heart Rate - physiology Humans Male Middle Aged Original Statistics, Nonparametric Stroke Volume - physiology Time Factors Treatment Outcome Ventricular Dysfunction, Left - physiopathology Ventricular Dysfunction, Left - therapy |
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| Title | Effects of exercise training on heart rate variability in Chagas heart disease |
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