New auxiliary indicators for the differential diagnosis of functional cardiorespiratory limitation in patients with chronic obstructive pulmonary disease and congestive heart failure

New auxiliary indicators for the differential diagnosis of functional cardiorespiratory limitation in patients with chronic obstructive pulmonary disease and congestive heart failure

Autor Cesar, Marcelo de Castro Autor UNIFESP Google Scholar
Camelier, Aquiles Assunção Autor UNIFESP Google Scholar
Jardim, José Roberto Autor UNIFESP Google Scholar
Montesano, Fábio Tadeu Autor UNIFESP Google Scholar
Tebexreni, Antonio Sergio Autor UNIFESP Google Scholar
Barros, Turíbio Leite de Autor UNIFESP Google Scholar
Instituição Centro de Medicina da Atividade Física e do Esporte
Universidade Federal de São Paulo (UNIFESP)
Resumo OBJECTIVE: To differentiate the nature of functional cardiorespiratory limitations during exercise in individuals with chronic obstructive pulmonary disease (COPD) or congestive heart failure (CHF) and to determine indicators that may help their classifications. METHODS: The study comprised 40 patients: 23 with COPD and 17 with CHF. All individuals underwent maximal cardiopulmonary exercise testing on a treadmill. RESULTS: The values of peak gas exchange ratio (R peak), peak carbon dioxide production (VCO2 peak), and peak oxygen ventilatory equivalent (V E O2 peak) were higher in the patients with CHF than in those with COPD, and, therefore, those were the variables that characterized the differences between the groups. For group classification, the differentiating functions with the R peak, VCO2 peak (L/min), and V E O2 peak variables were used as follows: group COPD: - 44.886 + 78.832 x R peak + 5.442 x VCO2 peak + 0.336 x V E O2 peak; group CHF: - 69.251 + 89.740 x R peak + 8.461 x VCO2 peak + 0.574 x V E O2 peak. The differentiating function, whose result is greater, correctly classifies the patient's group as 90%. CONCLUSION: The R peak, VCO2 peak, and V E O2 peak values may be used to identify the cause of the functional cardiorespiratory limitations in patients with COPD and CHF.
Palavra-chave exercise
obstructive pulmonary diseases
congestive heart failure
Idioma Inglês
Data de publicação 2003-05-01
Publicado em Arquivos Brasileiros de Cardiologia. Sociedade Brasileira de Cardiologia - SBC, v. 80, n. 5, p. 526-530, 2003.
ISSN 0066-782X (Sherpa/Romeo)
Publicador Sociedade Brasileira de Cardiologia - SBC
Extensão 526-530
Fonte http://dx.doi.org/10.1590/S0066-782X2003000500005
Direito de acesso Acesso aberto Open Access
Tipo Artigo
SciELO S0066-782X2003000500005 (estatísticas na SciELO)
Endereço permanente http://repositorio.unifesp.br/handle/11600/1709

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