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Physiological assessment of sensitivity of noninvasive testing for coronary artery disease
I Simonetti1, K Rezai, J D Rossen
1CNR Institute of Clinical Physiology, University of Pisa, Italy.
Insights
This study compared the sensitivity of three noninvasive tests for detecting coronary artery disease (CAD). Results indicate that no single test is definitively superior for patients with limited CAD, though sensitivity improves with lesion severity.
Area of Science:
- Cardiology
- Diagnostic Imaging
- Medical Technology
Background:
- Noninvasive tests are crucial for diagnosing coronary artery disease (CAD).
- Previous studies have evaluated various noninvasive methods with varying results.
- Rigorous assessment of sensitivity using objective criteria is needed for limited CAD.
Purpose of the Study:
- To compare the sensitivity of three noninvasive tests for coronary artery disease (CAD).
- To evaluate diagnostic performance using quantitative coronary angiography as a gold standard.
- To assess test sensitivity in relation to lesion severity and location.
Main Methods:
- Evaluated planar dipyridamole-201Tl scintigraphy, computer-assisted exercise treadmill, and high-dose dipyridamole echocardiography.
- Included 110 patients with limited CAD and no myocardial infarction.
- Used quantitative computerized coronary angiography (minimum cross-sectional area and percent area of stenosis) as the gold standard.
Main Results:
- Sensitivities ranged from 52% to 69% depending on the test and gold standard used.
- Dipyridamole echocardiography showed the highest sensitivity (61% and 69%) in some comparisons.
- Sensitivity increased with greater lesion severity and was better for left anterior descending coronary artery disease.
Conclusions:
- None of the evaluated noninvasive tests demonstrated definitively superior sensitivity for limited coronary artery disease.
- Test performance is influenced by the severity and location of coronary artery lesions.
- Further research may be needed to optimize noninvasive CAD detection.
Abstract:
The sensitivity of three noninvasive tests for coronary artery disease was assessed by means of quantitative indexes of disease severity in three different groups of patients. The overall population consisted of 110 subjects with limited coronary artery disease and no myocardial infarction. Planar dipyridamole-201Tl scintigraphy was evaluated in 31 patients, computer-assisted exercise treadmill in 28, and high-dose dipyridamole echocardiography testing in 51. Sensitivity was assessed by rigorous gold standards to define disease severity, such as measurement of minimum cross-sectional area and percent area of stenosis, by quantitative computerized coronary angiography (Brown/Dodge method). On the basis of the results of previous studies, the presence of physiologically significant coronary artery disease was indicated by a stenotic minimum cross-sectional area (MCSA) of less than 2.0 mm2 or a greater than 75% area of stenosis. With MCSA as the gold standard, dipyridamole-201Tl scintigraphy, computerized exercise treadmill, and dipyridamole echocardiography testing showed sensitivities of 52%, 54%, and 61%, respectively, in the three different patient cohorts enrolled. With percent area of stenosis as the gold standard, the sensitivity figures obtained for dipyridamole-201Tl, computerized exercise treadmill, and dipyridamole echocardiography testing were 64%, 54%, and 69%, respectively. For each of the three tests, sensitivity increased with increasing lesion severity. Sensitivity was also better in patients with left anterior descending coronary (LAD) disease when compared with patients with left circumflex or right coronary artery disease. Results of these studies, which were obtained with more strict patient selection criteria and by more rigorous gold standards than previous studies, demonstrate that in patients with limited coronary artery disease none of the tests evaluated is definitely superior in sensitivity.(ABSTRACT TRUNCATED AT 250 WORDS)