(p<0.05) between oxygen consumption (VO 2 ) and oxygen pulse (r=0.76), age (r=0.35) and body mass index (r=0.45) were found. There was no significant correlation between ventricular ejection fraction and the others studied variables. Comparing the functional classes of NYHA, significantly differences were found to VO 2 and oxygen pulse (p<0.05). In this study, the correlations reflect the complexity in analyzing and understanding the process of disfunction in HF, once probably other factors influence each of the variables studied. The classification of NYHA was effective to differentiate the patients with HF, reinforcing the indication of this stratification to identify different groups of HF patients to scientific researches and therapeutic interventions.Keywords | exercise test; heart failure; classification. ) e pulso de oxigênio (r=0, 76), idade (r=0,35) e índice de massa corpórea (r=0, 45). Não houve correlação significativa entre fração de ejeção ventricular e as demais variáveis estudadas. Comparando as classes da NYHA, foram encontradas diferenças para VO 2 e pulso de oxigênio (p<0, 05). Nesta pesquisa, as correlações refletem a complexidade de se analisar e entender o processo de disfunção da IC, considerando que provavelmente há outros fatores influenciando cada uma das variáveis estudadas. A classificação da NYHA foi efetiva na diferenciação dos indivíduos nos diferentes grupos, reforçando sua utilidade na caracterização de grupos de indivíduos com IC para fins de pesquisas cientí-ficas, assim como para avaliação de terapêuticas.
RESUMO |Descritores | teste de esforço; insuficiência cardíaca; classificação.Capacidade funcional de indivíduos com insuficiência cardíaca avaliada pelo teste de esforço cardiopulmonar e classificação da New York Heart Association
The estimated peak (Equation is included in full-text article.)O2 using the HAP was not concordant with the gold standard CPET measure. On the contrary, the HAP was able to differentiate NYHA functional class associated with the 6MWT distance; therefore, the HAP is a useful tool for assessing functional performance in patients with HF.
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