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Predictive value and limitations of the ST/HR slope
British Heart Journal
|May 1, 1985
Summary
The exercise ST/HR slope accurately identifies stable angina but shows limitations. False negatives occur post-myocardial infarction, and false positives arise with aortic regurgitation.
Area of Science:
- Cardiology
- Exercise Physiology
- Diagnostic Electrocardiography
Background:
- The exercise ST/HR slope is a valuable electrocardiographic marker.
- Its predictive accuracy can be limited in specific patient populations.
Purpose of the Study:
- To evaluate the diagnostic utility and limitations of the exercise ST/HR slope.
- To compare exercise test results across different patient groups.
Main Methods:
- Compared exercise ST/HR slope values in patients with stable angina, normal subjects, recent myocardial infarction, and aortic regurgitation.
- Analyzed false negative and false positive rates in each group.
Main Results:
- Normal subjects and stable angina patients showed high accuracy.
- Patients post-myocardial infarction exhibited significant false negative ST/HR slopes (36%).
- Aortic regurgitation patients demonstrated frequent false positive ST/HR slopes (88%).
Conclusions:
- The exercise ST/HR slope is reliable for stable angina.
- Its use is limited by false negatives in recent myocardial infarction and false positives in aortic regurgitation.