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The prognostic value of the exercise test
V F Froelicher1, G M Duarte, D F Oakes
1University of California, Irvine.
Disease-A-Month : DM
|November 1, 1988
Summary
Exercise stress tests help predict coronary heart disease prognosis but aren't always certain. Clinical judgment and specific exercise responses are key for guiding patient care and interventions.
Area of Science:
- Cardiology
- Diagnostic Testing
- Preventive Medicine
Background:
- Exercise testing is widely used to predict coronary heart disease severity and patient prognosis.
- However, its predictive accuracy for angiographic findings and poor outcomes has limitations.
- Accurate prognostic information is crucial for selecting patients who benefit from interventions and for cost-effective healthcare.
Purpose of the Study:
- To review recent studies on the prognostic value of exercise testing in various patient groups.
- To evaluate the predictive accuracy of exercise tests for guiding clinical decisions and interventions.
- To assess the role of exercise testing in patients recovering from myocardial infarction, with stable coronary heart disease, and in apparently healthy individuals.
Main Methods:
- Systematic review of 24 studies on exercise testing in post-myocardial infarction patients.
- Analysis of studies considering coronary angiographic findings, cardiac endpoints, and survival with coronary artery bypass surgery in stable coronary heart disease.
- Evaluation of exercise testing in apparently healthy individuals, focusing on silent ischemia and screening accuracy.
Main Results:
- Silent ischemia from exercise testing in healthy men is less predictive of poor outcomes than previously thought.
- Exercise testing for screening is misleading due to a high rate of false positive results.
- In post-myocardial infarction patients, clinical judgment, abnormal systolic blood pressure response, and poor exercise capacity are better predictors of high risk than ST-segment shifts.
- In stable coronary heart disease, exercise tests show prognostic power for angiographic findings, cardiac events, and outcomes of revascularization versus medical therapy.
Conclusions:
- Exercise testing is a valuable noninvasive tool for prognostic evaluation in coronary artery disease, complementing history, physical exam, and ECG.
- It provides crucial information for patient status assessment and optimal management recommendations.
- Exercise test results aid in selecting appropriate patients for coronary angiography, considering quality-of-life implications.