Predicting Peak Oxygen Consumption During a Conservative Ramping Protocol
- 1 May 2003
- journal article
- Published by Wolters Kluwer Health in Journal of Cardiopulmonary Rehabilitation
- Vol. 23 (3) , 183-189
- https://doi.org/10.1097/00008483-200305000-00004
Abstract
PURPOSE: A significant discrepancy between measured oxygen consumption (VO2) (via ventilatory expired gas analysis) and estimated VO2 (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 VO2 (VO2 discrepancy) during a highly conservative ramping protocol. METHODS: For 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. RESULTS: Peak estimated and measured VO2 values were significantly higher in the age-, gender-, and activity-matched control group than in the HF group, but the change in measured VO2 per change in estimated VO2 (Δmeasured/Δestimated VO2 slope) and the VO2 discrepancy did not reach statistical significance. Peak estimated VO2 was a significant predictor of peak measured VO2 in the overall HF group (R2 = 0.90; P < .001). CONCLUSIONS: Although estimated VO2 is not considered a replacement for measured VO2, these results indicate that a highly conservative exercise protocol may allow for a more accurate prediction of peak measured VO2 via the estimated oxygen cost for a given workload in patients with compensated HF.Keywords
This publication has 23 references indexed in Scilit:
- Measurement of oxygen consumption on-kinetics during exercise: Implications for patients with heart failureJournal of Cardiac Failure, 2001
- Exercise Standards for Testing and TrainingCirculation, 2001
- Skeletal muscle &OV0312;O2 on-kinetics: set by O2 delivery or by O2 utilization? New insights into an old issueMedicine & Science in Sports & Exercise, 2000
- Oxygen Uptake Kinetics During ExerciseSports Medicine, 1999
- Oxygen uptake kinetics are determined by cardiac function at onset of exercise rather than peak exercise in patients with prior myocardial infarction.Circulation, 1994
- Comparison of the ramp versus standard exercise protocolsJournal of the American College of Cardiology, 1991
- V O 2 kinetics in subjects differing in aerobic capacity: investigation by spectral analysisEuropean Journal of Applied Physiology, 1987
- Errors in predicting functional capacity for postmyocardial infarction patients using a modified Bruce protocolAmerican Heart Journal, 1984
- Factors influencing estimated oxygen uptake during exercise testing soon after myocardial infarctionThe American Journal of Cardiology, 1982
- Comparative analysis of physiologic responses to three different maximal graded exercise test protocols in healthy womenAmerican Heart Journal, 1982