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Clinical Implications and Debates on the International Study of Comparative Health Effectiveness with Medical and

Yuichi Saito1, Takeshi Nishi1, Kan Saito1

  • 1From the Department of Cardiovascular Medicine, Chiba University Graduate School of Medicine, Chiba, Japan.

Cardiology in Review
|March 24, 2021
PubMed

Insights

The ISCHEMIA trial found that for stable ischemic heart disease, revascularization did not reduce major events but improved angina. Noninvasive ischemia testing proved challenging, potentially simplifying treatment decisions.

Area of Science:

  • Cardiology
  • Ischemic Heart Disease Management

Background:

  • Prior studies on coronary revascularization for stable ischemic heart disease (SIHD) yielded conflicting results.
  • Observational data suggested benefits, but the COURAGE trial questioned revascularization's impact on clinical outcomes.

Purpose of the Study:

  • To evaluate the effectiveness of an invasive strategy (coronary revascularization) versus a conservative medical therapy strategy in patients with SIHD.
  • To assess the role of noninvasive ischemia testing in guiding treatment decisions for SIHD.

Main Methods:

  • The ISCHEMIA trial randomized patients with moderate-to-severe ischemia to an invasive strategy or optimal medical therapy.
  • Patients underwent noninvasive stress testing, with coronary computed tomography angiography used for anatomical assessment.

Main Results:

  • The invasive strategy did not significantly reduce the composite endpoint of cardiovascular death or myocardial infarction compared to optimal medical therapy.
  • Patients in the invasive group experienced greater relief of angina symptoms.
  • Noninvasive ischemia testing demonstrated limitations in predicting outcomes.

Conclusions:

  • For patients with SIHD and moderate-to-severe ischemia, an invasive strategy with revascularization does not reduce major adverse cardiovascular events compared to optimal medical therapy.
  • Revascularization provides symptomatic relief (antianginal effects) in SIHD patients.
  • The ISCHEMIA trial findings may help refine clinical decision-making regarding coronary revascularization in SIHD.

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