Effect of physical exercise training in patients with Chagas heart disease: study protocol for a randomized controlled trial (PEACH study)

Mendes, Fernanda de Souza Nogueira Sardinha
Sousa, Andréa Silvestre
Souza, Fernando Cesar de Castro Cesar
Pinto, Vivian Liane Mattos
Silva, Paula Simplicio
Saraiva, Roberto Magalhães
Xavier, Sergio Salles
Veloso, Henrique Horta
Holanda, Marcelo Teixeira
Costa, Andréa Rodrigues
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Background: The effects of exercise training on Chagas heart disease are still unclear. This study aimed to evaluate the effect of exercise training over functional capacity, cardiac function, quality of life, and biomarkers in Chagas heart disease. Methods: The PEACH study is a superiority randomized clinical trial which will include subjects who meet the following criteria: Chagas heart disease with a left ventricular ejection fraction below 45 % with or without heart failure symptoms; clinical stability in the last 3 months; adherence to clinical treatment; and age above 18 years. The exclusion criteria are: pregnancy; neuromuscular limitations; smoking; evidence of non-chagasic heart disease; systemic conditions that limit exercise practice or cardiopulmonary exercise test; unavailability to attend the center three times a week during the intervention period; and practitioners of regular exercise. The intervention group will perform an exercise training intervention three times per week during 6 months and will be compared to the control group without exercise. Both groups will undergo the same monthly pharmaceutical and nutritional counseling as well as standard medical treatment according to the Brazilian consensus on Chagas disease. The primary outcome is functional capacity based on peak exercise oxygen consumption during cardiopulmonary exercise testing. Secondary outcomes are: cardiac function; body composition; muscle respiratory strength; microvascular reactivity; cardiac rhythm abnormalities; autonomic function; biochemical; oxidative stress and inflammatory biomarkers; and quality of life. Subjects will be evaluated at baseline, and at 3 and 6 months after randomization. Thirty patients will be randomly assigned into exercise or control groups at a ratio of 1:1. Discussion: Findings of the present study will be useful to determine if physical exercise programs should be included as an important additional therapy in the treatment of patients with Chagas heart disease. Trial registration: ClinicalTrials.gov ID: NCT02517632 (registered on 6 August 2015).
Cardiac rehabilitation, Cardiopulmonary exercise test, Chagas heart disease, Exercise training, Heart failure
Mendes Fde S, Sousa AS, Souza FC, Pinto VL, Silva PS, Saraiva RM et al. Effect of physical exercise training in patients with Chagas heart disease: study protocol for a randomized controlled trial (PEACH study). Trials. 2016 Sep 2;17(1):433