Impact of optimal medical therapy and percutaneous coronary intervention on patients with stable angina
Azeem Latib1, Alaide Chieffo, Antonio Colombo
1Interventional Cardiology Unit, San Raffaele Scientific Institute, Milan, Italy.
Insights
For chronic stable angina, percutaneous coronary intervention (PCI) offers no survival benefit over optimal medical therapy (OMT). PCI may improve symptoms in severe cases, but OMT alone is effective for mild symptoms.
Area of Science:
- Cardiology
- Interventional Cardiology
- Clinical Trials
Background:
- Chronic stable angina (CSA) management often involves revascularization strategies.
- The COURAGE trial investigated the role of percutaneous coronary intervention (PCI) versus optimal medical therapy (OMT) in CSA patients.
Purpose of the Study:
- To evaluate the impact of PCI plus OMT versus OMT alone on clinical outcomes and quality of life in patients with CSA.
- To identify patient subgroups who may benefit most from PCI.
Main Methods:
- A substudy of the COURAGE trial involving patients with CSA, normal left ventricular function, and moderate coronary artery disease.
- Comparison of outcomes between patients receiving PCI plus OMT and those receiving OMT alone.
Main Results:
- Both PCI plus OMT and OMT alone significantly improved quality of life and angina symptoms.
- PCI provided substantial benefit for patients with more severe and frequent angina.
- No significant difference in the risk of death or myocardial infarction between the two groups.
Conclusions:
- For patients with CSA and moderate coronary artery disease, OMT alone is as effective as PCI plus OMT in reducing mortality and myocardial infarction risk.
- PCI may offer additional symptomatic relief for select patients with severe angina.
- OMT alone is a sufficient and effective strategy for patients with mild angina or no significant ischemia.
Abstract:
Percutaneous coronary intervention (PCI) is not associated with reduction in risk of death or myocardial infarction in patients who have chronic stable angina with normal left ventricular function and moderate coronary artery disease. A substudy of the COURAGE trial has shown that both PCI plus optimal medical therapy (OMT) and OMT alone result in marked improvements in quality of life and angina, but that PCI can substantially benefit patients with more-severe and more-frequent angina. A number of caveats to this study exist, including the extent to which the findings can be applied to the general patient population and the large proportion of patients who had mild angina or were asymptomatic--it is difficult to make these patients feel better. In addition, the remarkable commitment of both healthcare providers and patients in this study would be hard to achieve in clinical practice. Nevertheless, for patients with mild or no angina and no significant ischemia on stress testing, the COURAGE trial reassures us that OMT alone can be efficacious in reducing angina and/or improving quality of life.
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