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Functional testing after coronary artery bypass graft surgery: a meta-analysis
Anne S L Chin1, Lorne E Goldman, Mark J Eisenberg
1Department of Radiology, Jewish General Hospital and McGill University, Montréal, Québec, Canada.
The Canadian Journal of Cardiology
|June 19, 2003
Summary
Stress ventricular imaging is superior to exercise treadmill testing for diagnosing graft stenosis or disease progression after coronary artery bypass graft surgery. This meta-analysis confirms its enhanced diagnostic accuracy in post-CABG patients.
Area of Science:
- Cardiology
- Medical Diagnostics
Background:
- Numerous studies have evaluated functional tests for assessing graft stenosis or coronary artery disease progression post-coronary artery bypass graft (CABG).
- A comprehensive meta-analysis of these diagnostic abilities was previously lacking.
Purpose of the Study:
- To systematically pool and analyze the diagnostic performance of exercise treadmill testing (ETT), stress myocardial perfusion imaging, and stress echocardiography.
- To evaluate their effectiveness in predicting graft stenosis or disease progression in native vessels following CABG.
Main Methods:
- A systematic MEDLINE search identified relevant studies on post-CABG functional testing.
- Sensitivities, specificities, predictive values, and likelihood ratios were calculated and pooled.
Main Results:
- Exercise treadmill testing (ETT) showed 45% sensitivity and 82% specificity for graft stenosis or disease progression.
- Stress myocardial perfusion imaging improved sensitivity to 68% and specificity to 84%.
- Stress echocardiography demonstrated the highest diagnostic accuracy with 86% sensitivity and 90% specificity.
Conclusions:
- Stress ventricular imaging, particularly stress echocardiography, significantly outperforms ETT alone.
- Stress imaging is the preferred functional test for diagnosing graft stenosis or native vessel disease progression post-CABG.