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European Heart Journal 1988 9(9):948-954;
Copyright © 1988 by the European Society of Cardiology.
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© 1988 The European Society of Cardiology

Reproducibility of cardiopulmonary exercise testing in men following myocardial infarction

K. DICKSTEIN, S. BARVIK, T. AARSLAND and S. SNAPINN

Cardiopulmonary Exercise Laboratory, Cardiology Department, Central Hospital in Rogaland Stavanger, Norway

Received 5 November 1987; revised 29 February 1988; .

Address for reprints: Kenneth Dickstein, M.D., Cardiology Department, Central Hospital in Rogaland, Stavanger 4000, Norway.

Abstract

Peak oxygen consumption during progressive exercise is of clinical relevance in the functional evaluation of the cardiac patient. The use of cardiopulmonary exercise testing for the evaluation of the efficacy of therapeutic intervention requires that the methods used yield reproducible results. This study compared the results of two consecutive, symptom-limited, maximal exercise tests in 170 men following confirmed myocardial infarction. On-line, real-time respiratory gas exchange was measured on a breath-by-breath basis. The data were processed by the system using a 9 s moving average filter and the peak values were determined as averaged over a representative 20-s interval during the final 1 min of the test. The mean (±SD) total exercise times for the two tests were 635 (±109) vs.652(±112) (r=0.946). The mean (±SD) peak VO2 values were 1480 (±337) vs. 1495 (±350) ml min–1 (r=0.923). Performance could not be predicted by routine assessment of infarct type or size. This study demonstrates that maximal cardiopulmonary exercise testing in men following myocardial infraction yields highly reproducible results.

Key Words: Cardiopulmonary exercise testing • peak oxygen uptake • reproducibility • ischaemic heart disease


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