To develop a submaximal constant work rate exercise test able to grade cardiovascular dysfunction in patients with chronic heart failure, 80 patients and 59 control subjects performed a symptom-limited incremental exercise test and a constant work rate exercise test at a fixed work rate (50 W for 4 minutes). The time constant of VO2 at the start of constant work rate exercise and time for gas exchange ratio (respiratory exchange ratio) to equal 1 were independent predictors of cardiovascular functional class and correctly classified the functional class in 89 +/- 9% and 83 +/- 11% of patients, respectively.
A four-minute submaximal constant work rate exercise test to assess cardiovascular functional class in chronic heart failure / R. Belardinelli, Y. Y. Zhang, K. Wasserman, A. Purcaro, P. G. Agostoni. - In: THE AMERICAN JOURNAL OF CARDIOLOGY. - ISSN 0002-9149. - 81:10(1998 May 15), pp. 1210-4-1214.
A four-minute submaximal constant work rate exercise test to assess cardiovascular functional class in chronic heart failure
P. G. AgostoniUltimo
1998
Abstract
To develop a submaximal constant work rate exercise test able to grade cardiovascular dysfunction in patients with chronic heart failure, 80 patients and 59 control subjects performed a symptom-limited incremental exercise test and a constant work rate exercise test at a fixed work rate (50 W for 4 minutes). The time constant of VO2 at the start of constant work rate exercise and time for gas exchange ratio (respiratory exchange ratio) to equal 1 were independent predictors of cardiovascular functional class and correctly classified the functional class in 89 +/- 9% and 83 +/- 11% of patients, respectively.Pubblicazioni consigliate
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