TESTE GRADUADO DA CAMINHADA (SHUTTLE WALK TEST) NA AVALIAÇÃO FUNCIONAL DE PACIENTES COM INSUFICIÊNCIA CARDÍACA CRÔNICA / Incremental shuttle walk test in the assessment of functional capacity in chronic heart failure

AUTOR(ES)

Cristiane Pulz

DATA DE PUBLICAÇÃO

2006

RESUMO

Objectives: To access the safety, reproducibility, and accuracy at estimating peak oxygen consumption and prognostic value in shuttle walk test compared to six-minute walk test in patients with symptomatic chronic heart failure. Methods: Sixty-three patients with heart failure were prospectively assessed. All patients underwent cardiopulmonary exercise test, two shuttle walk tests, and two six-minute walk tests. Patients were followed-up for a mean period of 14.01 7.8 months. Results: Mean age of patients was 51.28 10.26 years old, ejection fraction was 24.05 5.69%, and peak oxygen consumption was 16.79 5.76ml/kg/min. Distances walked in the first and second shuttle tests were 414.44 122.87 and 422.85 119.18m, respectively, which proved their great reproducibility (ρ = 0.979). The test was also safe. Distance walked in the shuttle walk test was shorter compared to that walked in six-minute walk test (p <0.001), the perception of effort rate was greater (p = 0.029). There was a strong correlation between the distances walked in both tests (r = 0.88), and between shuttle walk test distance and peak oxygen consumption (r = 0.79). Accuracy to estimate peak oxygen consumption smaller or equal to 14ml/kg/min was similar in both tests. Distances walked in both tests were not predictors of events and peak oxygen consumption was the only predictor of event free survival. Conclusions: Shuttle walk test is reproducible, safe, presenting a satisfactory correlation with six-minute walk test, and with peak oxygen consumption; it has been proved sensitive and specific in estimating peak oxygen consumption lower than 14ml/kg/min. However, it could not provide information on the prognosis of the patients from this sample.

ASSUNTO(S)

1. insuficiência cardíaca congestiva. 2. consumo de oxigênio. 3. tolerância ao exercício. 4. caminhada. 5. prognóstico cardiologia

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