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Title: [Reproducibility of symptom-limited oxygen consumption and anaerobic threshold within the scope of spiroergometric studies in patients with heart failure]. Author: Behrens S, Andresen D, Brüggemann T, Ehlers C, Schröder R. Journal: Z Kardiol; 1994 Jan; 83(1):44-9. PubMed ID: 8147069. Abstract: A prerequisite for the clinical utility of cardiopulmonary exercise testing is high reproducibility of gas-exchange characteristics. Therefore, we studied reproducibility of peak oxygen uptake and anaerobic threshold during bicycle-exercise stress testing in 34 patients with congestive heart failure in NYHA classes II and III. Additionally, we analyzed interobserver variability with regard to anaerobic threshold measured with the V-slope method. Correlations of results between two exercise stress tests were high concerning peak oxygen uptake and anaerobic threshold (r = 0.871 and r = 0.917, respectively). For both measures, however, 90% percentile of the relative difference between tests was 25% and 22%, respectively. Correlation between two observers with regard to the anaerobic threshold was high (r = 0.985). We conclude that reproducible determination of peak oxygen uptake and anaerobic threshold is possible in heart-failure patients. In individual subjects, however, considerable variation of results may occur during serial exercise testing. Interobserver variability with regard to anaerobic threshold is low.[Abstract] [Full Text] [Related] [New Search]