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Electrographic exercise stress testing and coronary arteriography. Correlation among 114 men with chest pain
Insights
Exercise stress testing (EST) effectively predicts coronary artery disease in men experiencing chest pain. However, its accuracy diminishes when used for screening asymptomatic individuals or those with risk factors other than chest pain.
Area of Science:
- Cardiology
- Diagnostic Imaging
Background:
- Chest pain evaluation often involves assessing for coronary artery disease (CAD).
- Exercise stress testing (EST) is a common diagnostic tool, but its predictive value varies.
- Coronary arteriography remains the gold standard for diagnosing CAD.
Purpose of the Study:
- To compare the diagnostic accuracy of electrocardiographic exercise stress testing (EST) with coronary arteriography in men evaluated for chest pain.
- To determine the sensitivity, specificity, and predictive values of EST in this specific patient population.
Main Methods:
- 114 men with chest pain underwent both EST and coronary arteriography.
- Participants were categorized into two groups based on arteriographic findings: significant coronary stenosis (Group A) or no significant stenosis (Group B).
- Only men with positive EST results or negative EST results after achieving 90% of predicted maximum heart rate were included.
Main Results:
- EST demonstrated a sensitivity of 80.4% and specificity of 88.6% for detecting significant coronary artery disease.
- The predictive value of a positive EST result was 91.1%, and a negative result was 75.6%.
- The overall efficiency of EST in this cohort was 83.7%.
Conclusions:
- Maximal exercise stress testing is a valuable predictor of coronary artery disease in male patients presenting with chest pain.
- The utility of EST as a predictor of CAD is significantly reduced when applied to populations selected for reasons other than chest pain, such as elevated lipids or age.
Abstract:
The electrocardiographic response to exercise stress testing (EST) was compared with coronary arteriographic findings in 114 men referred for evaluation of chest pain. The men were divided into two groups: group A (69 men) in whom the coronary arteriograms showed at least one major vessel with greater than 70 percent reduction in cross sectional area, and group B (45 men) in whom there was no evidence of coronary arterial narrowing. In both groups A and B the description of chest pain was judged to be at least consistent with the diagnosis of angina pectoris if not always representing classical angina pectoris. Only men with a positive finding to EST and those with a negative EST response after achieving at least 90 percent of predicted maximum heart rate were included in the calculations. Our results were strikingly similar to those obtained from an extensive review of the literature and showed the following: sensitivity, 80.4 percent; specificity, 88.6 percent; predictive value of a positive test result, 91.1 percent; predictive value of a negative test result, 75.6 percent, and efficiency of the test 83.7 percent. The maximal EST is a useful predictor of coronary artery disease when a male population is evaluated for chest pain. When a population is selected on some basis other than chest pain (such as elevated lipids or age), EST is a much less useful predictor of coronary artery disease.