Test-Retest Reliability of Maximal and Submaximal Gas Exchange Variables in Patients With Coronary Artery Disease
A study from the Journal of Cardiopulmonary Rehabilitation & Prevention analyses the reliability of gas exchange variables derived from CPET.
Gas exchange variables derived from cardiopulmonary exercise tests (CPETs) need to be reliable for evaluating interventions and clinical decision making. Whereas peak oxygen uptake (VO2) has shown to be a highly reliable parameter in patients with coronary artery disease (CAD), little is known about the reproducibility of these parameters in patients with CAD. Therefore, the purpose of this study was to confirm the reliability of peak VO2 and to investigate the reliability of submaximal CPET variables in patients with CAD.
Eighty-five patients with CAD (57.6 +/- 8.5 years; 79 males) performed 2 CPETs within 10 days before starting a rehabilitation program.
Both peak VO2 and OUES show excellent test-retest reliability. Accordingly, in the case of no or unreliable peak VO2 data, we suggest using OUES to evaluate cardiorespiratory fitness in patients with CAD.
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