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[Elective noninvasive test in the diagnosis of coronary disease in the aged]
E Batlle1, I Vilacosta, J A San Román
1Servicio de Cardiología, Hospital Universitario San Carlos, Madrid.
Insights
The exercise stress test is the best noninvasive option for diagnosing coronary artery disease in elderly patients. If inconclusive, stress echocardiography offers higher specificity than scintigraphy.
Area of Science:
- Cardiology
- Diagnostic Imaging
- Geriatric Medicine
Background:
- Coronary artery disease (CAD) diagnosis in the elderly presents unique challenges.
- Noninvasive testing is crucial for evaluating chest pain in older adults.
Purpose of the Study:
- To identify the optimal noninvasive diagnostic test for coronary artery disease in patients over 65.
- Compare the efficacy of exercise stress testing, echocardiography, and MIBI-SPECT.
Main Methods:
- 56 elderly patients (>65 years) with chest pain and no prior CAD history were studied.
- Participants underwent exercise stress test, dipyridamole echocardiography, dobutamine echocardiography, dobutamine MIBI-SPECT, and coronary angiography.
Main Results:
- All tested noninvasive methods showed similar sensitivity for detecting significant CAD.
- Stress echocardiography demonstrated higher specificity compared to MIBI-SPECT (100% vs 66% for dipyridamole; 93% vs 66% for dobutamine).
- Overall diagnostic accuracy was comparable across the evaluated noninvasive tests.
Conclusions:
- The exercise stress test is the preferred initial noninvasive diagnostic tool for CAD in the elderly.
- For inconclusive stress tests, stress echocardiography and isotopic studies are valuable alternatives.
- Stress echocardiography exhibits superior specificity over scintigraphy in this population.
Background And Purpose:
The purpose of this study was to determine the best noninvasive test to diagnose coronary artery disease in the elderly. PATTERNS AND METHODS: We conducted a study on 56 elderly patients (> 65 years) with chest pain and no previous history of coronary artery disease. They underwent exercise stress test, dipyridamole echocardiography (0.84 mg/kg), dobutamine echocardiography (up to a total dose of 40 microgram/kg/min and atropine when it was necessary), dobutamine MIBI-SPECT and coronary angiography.
Results:
Angiography detected significant coronary artery disease in 41 patients. All tests used in this study had a similar sensitivity (conclusive exercise stress test 87%, dipyridamole echocardiography 83%, dobutamine echocardiography 80% and MIBI-SPECT 87%; p = NS). Coronary angiography did not identify significant lesions in 15 patients. Specificity of conclusive exercise stress test, dipyridamole and dobutamine echocardiography was similar (75%, 100% and 93% respectively; p = NS). However, the specificity of stress echocardiography was higher than that of scintigraphy (100% vs 66%; p = 0.02 for dipyridamole echocardiography and 93% vs 66%; p = 0.07 for dobutamine echocardiography). Diagnostic accuracy of each test was similar.
Conclusions:
Exercise stress test remains the non invasive diagnostic test of choice to detect coronary disease in the elderly. If this test is inconclusive, both stress echocardiography and isotopic studies are useful, although the specificity of stress echocardiography is higher than that of scintigraphy.