Copyright © 1990 by the European Society of Cardiology.
© 1990 The European Society of Cardiology
Reproducibility of cardiopulmonary parameters during exercise in patients with chronic cardiac failure. The need for a preliminary test
Royal Victoria Hospital Belfast BT12BA, Northern Ireland
Received 10 November 1988; revised 21 April 1989; .
correspondence to: Dr D.p. P. Nicholls, Royal Victoria Hospital Belfast BT126BA, Northern Ireland
Abstract
To examine the reproducibility of cardiopulmonary exercise testing in patients with heart failure, three consecutive tests were performed in 30 such patients. The first test underestimated treadmill exercise time by about 20% when compared with the second and third tests, which were not significantly different. Peak achieved VO, VCO,and VE were also less during the first test, but blood pressure, heart rate and respiratory rate responses were similar in the three tests. When cardiopulmonary exercise tests are used to assess functional capacity in either individual patients or groups (as in a therapeutic trial), at least two tests should be performed, as a single test is likely to underestimate exercise capacity.
Key Words: Exercise testing • reproducibility • heart failure
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