The results of exercise testing should be stratified to determine the need for additional invasive or exercise perfusion studies. If the exercise test studies are negative, a second symptom-limited exercise test could be repeated at 3 to 6 weeks for patients undergoing vigorous activity during leisure time activities, at work, or exercise training as part of cardiac rehabilitation. The extent of reversible ischemia on the exercise imaging study should be considered before proceeding to cardiac catheterization. A small area contiguous to the infarct zone may not necessarily require catheterization. From Froelicher et al 174 with permission.
Unity is achieved when predicted oxygen uptake is equal to measured oxygen uptake.
CHF indicates congestive heart failure. From Froelicher et al 174 with permission. From Froelicher et al 174 with permission.