Copyright © 1992 by the European Society of Cardiology.
© 1992 The European Society of Cardiology
The use of an exponential protocol for bicycle and treadmill exercise testing in patients with chronic cardiac failure
Royal Victoria Hospital Belfast, N. Ireland
*Western General Infirmary Glasgow, Scotland
Received 30 October 1991; revised 21 April 1992; .
Correspondence Dr D. P. Nicholls, Royal Victoria Hospital, Grosvenor Road, Belfast, N Ireland, BT12 6BA
Abstract
We have studied a standardized exercise protocol suitable for use with a treadmill or bicycle (STEEP protocol) and compared it with a modified Bruce treadmill protocol in a group of patients with chronic cardiac failure. The STEEP protocol has been previously validated in normal subjects. Exercise time (6·79±2·42 vs 5·34±1.95 min, P<0·05) and peak VO2 (16·66±4·09 vs 15·01±3·72 ml. min–1. kg–1, P>0·05) were greater with the STEEP treadmill compared with the bicycle protocol, but VO2 was very similar at equal exercise stages in both modalities. Heart rate and respiratory exchange ratio tended to be greater during bicycle exercise at equal stages. Exercise time was greater with the modified Bruce protocol (9·00±3·02 min, P<0·05) than with either STEEP protocol, but peak VO2 (17·13±4·52 ml. min–1. kg–1) was similar to that obtained with the STEEP treadmill test. We conclude that the STEEP protocol may be used to test patients with chronic cardiac failure, and that exercise times relate well in both treadmill and bicycle. The protocol should prove useful in studies involving a wide range of exercise capacities or both bicycle and treadmill exercise.
Key Words: Exercise protocols • cardiac failure • bicycle ergometry • treadmill exercise
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