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Predicting peak oxygen consumption during a conservative ramping protocol
ARENA R; HUMPHREY R; PEBERDY MA
J CARDPULM REHABIL , 2003, vol. 23, n° 3, p. 183-189 Doc n°: 109034 Localisation : Documentation IRR Descripteurs : FA2 - EXPLORATION EXAMENS BILANS - COEUR A significant discrepancy between measured oxygen consumption (VO(2)) (via ventilatory expired gas analysis) and estimated VO(2) (via the imposed workload) frequently is reported in the heart failure (HF) population during symptom-limited exercise testing. The purpose of this investigation was to examine the difference between measured and estimated VO(2) (VO(2) discrepancy) during a highly conservative ramping protocol.METHODSFor this study, 28 subjects with compensated HF (20 men and 8 women; age, 51.1 +/- 14.6 years) and 19 healthy control subjects (age-, gender-, and activity-matched to an HF subgroup) underwent symptom-limited exercise testing (treadmill) with ventilatory expired gas analysis.RESULTSPeak estimated and measured VO(2) values were significantly higher in the age-, gender-, and activity-matched control group than in the HF group, but the change in measured VO(2) per change in estimated VO(2) (Deltameasured/Deltaestimated VO(2) slope) and the VO(2) discrepancy did not reach statistical significance. Peak estimated VO(2) was a significant predictor of peak measured VO(2) in the overall HF group Langue : ANGLAIS Tiré à part : OUI Identifiant basis : 2003227132 |
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