Achieving an Exercise Workload of  10 Metabolic Equivalents Predicts a Very Low Risk of Inducible IschemiaDoes Myocardial Perfusion Imaging Have a Role?
Jamieson M. Bourque, MD, MHS*,
Benjamin H. Holland, MD,
Denny D. Watson, PhD and
George A. Beller, MD
Cardiovascular Division and the Cardiovascular Imaging Center, Department of Internal Medicine, University of Virginia Health System, Charlottesville, Virginia
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Figure 2 Prevalence of LV Ischemia by Exercise Capacity
The 974 individuals reaching 85% of their maximum age-predicted heart rate were divided by exercise workload achieved (horizontal axis). The vertical axis represents the percentage of subjects with each percentage of left ventricular (LV) ischemia. MET = metabolic equivalent.
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Figure 3 Relationship of Ischemic ST-Segment Depression on the Exercise ECG and Workload Achieved to the Percentage of LV Ischemia
The 974 subjects reaching  85% of their maximum age-predicted heart rate were divided by the exercise workload attained and the presence of ischemic ST-segment depression. The vertical axis represents the prevalence of 5% to 9% and 10% LV ischemia. ECG = electrocardiogram; other abbreviations as in Figure 2.
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