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The minute ventilation/carbon dioxide production slope is prognostically superior to the oxygen uptake efficiency slope.

Abstract：

BACKGROUND:Ventilatory efficiency, commonly assessed by the minute ventilation (VE)-carbon dioxide production (VCO2) slope, has proven to be a strong prognostic marker in the heart failure (HF) population. Recently, the oxygen uptake efficiency slope (OUES) has demonstrated prognostic value, but additional comparisons to established cardiopulmonary exercise test (CPET) variables are required. METHODS AND RESULTS:A total of 341 subjects were diagnosed with HF participated in this analysis. The VE/VCO2 slope and the OUES were calculated using 50% (VE/VCO2 slope(50) or OUES(50)) and 100% (VE/VCO2 slope(100) or OUES(100)) of the exercise data. Peak oxygen consumption (VO2) was also determined. There were 47 major cardiac-related events during the 3-year tracking period. Receiver operating characteristic (ROC) curve analysis demonstrated the classification schemes for both VE/VCO2 slope and OUES calculations as well as peak VO2 were statistically significant (all areas under the ROC curve: > or = 0.74, P < .001). Area under the ROC curve for the VE/VCO2 slope(100) was, however, significantly greater than OUES(50), OUES(100), and peak VO2 (P < .05). CONCLUSIONS:Although the OUES was a significant predictor of mortality, the VE/VCO2 slope maintained optimal prognostic value. An elevated VE/VCO2 slope may be the single best indicator of increased risk for adverse events.

journal_name

J Card Fail

journal_title

Journal of cardiac failure

authors

Arena R,Myers J,Hsu L,Peberdy MA,Pinkstaff S,Bensimhon D,Chase P,Vicenzi M,Guazzi M

doi

10.1016/j.cardfail.2007.03.004

subject

Has Abstract

pub_date

2007-08-01 00:00:00

pages

462-9

issue

6

eissn

1071-9164

issn

1532-8414

pii

S1071-9164(07)00095-4

journal_volume

13

pub_type

杂志文章,多中心研究

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