Heart failure: comparison between six-minute walk test and cardiopulmonary test

Chronic heart failure (HF) is a syndrome characterized by reduced cardiac output in relation to the metabolic needs of the organism, as well as metabolic and neurohormonal axis abnormalities. Symptoms such as fatigue and dyspnoea are notorious and stress tests are widely used to assess functional ca...

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Veröffentlicht in:Arquivos brasileiros de cardiologia 2011-07, Vol.97 (1), p.59-64
Hauptverfasser: Carvalho, Eduardo Elias Vieira de, Costa, Daniela Caetano, Crescêncio, Júlio César, Santi, Giovani Luiz De, Papa, Valéria, Marques, Fabiana, Schmidt, André, Marin-Neto, José Antonio, Simões, Marcus Vinícius, Gallo Junior, Lourenço
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container_title Arquivos brasileiros de cardiologia
container_volume 97
creator Carvalho, Eduardo Elias Vieira de
Costa, Daniela Caetano
Crescêncio, Júlio César
Santi, Giovani Luiz De
Papa, Valéria
Marques, Fabiana
Schmidt, André
Marin-Neto, José Antonio
Simões, Marcus Vinícius
Gallo Junior, Lourenço
description Chronic heart failure (HF) is a syndrome characterized by reduced cardiac output in relation to the metabolic needs of the organism, as well as metabolic and neurohormonal axis abnormalities. Symptoms such as fatigue and dyspnoea are notorious and stress tests are widely used to assess functional capacity, prognosis and effectiveness of therapeutic interventions in this syndrome. To evaluate the reproducibility of the six-minute walk test (6MW) in patients with HF and correlate the magnitude of the variables reached at peak exercise of the 6MWT with a cardiopulmonary exercise test (CPET). We studied 16 patients (12 men and 4 women) diagnosed with HF FC I-II (NYHA). The volunteers underwent two 6MWT (6MWT'1 and 6MWT'2) with 30-minute interval between them; then, they underwent a maximum CPET. All variables obtained in the two 6MWT' proved to be significant with high correlations: distance walked (DW) (r = 0.93, p < 0.0001), heart rate (HR) (r = 0.89, p < 0.0001), oxygen consumption (VO2) (r = 0.93, p < 0.0001) and scale of perceived exertion (r = 0.85, p < 0.0001). In turn, all variables analyzed in the 6MWT' showed significant and moderate correlations with the variables obtained from the CPET, namely: peak HR (r = 0.66; p = 0.005); VO2 (r = 0.57; p = 0.02) and VO2 in the CPET and DT in the 6MWT'2 (r = 0.70; p = 0.002). The 6MWT was reproducible in this group of patients with HF (NYHA - I-II) and correlated with the CPET. Therefore, it is a tool for reliable evaluation, and a suitable, safe and low-cost alternative for the prescription of aerobic exercise in patients with HF.
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subjects Aged
Exercise Test
Exercise Tolerance - physiology
Female
Heart Failure - physiopathology
Humans
Male
Middle Aged
Oxygen Consumption - physiology
Predictive Value of Tests
Reproducibility of Results
Respiratory Function Tests
Statistics, Nonparametric
Time Factors
Walking - physiology
title Heart failure: comparison between six-minute walk test and cardiopulmonary test
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