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Medical Therapy With Versus Without Revascularization in Stable Patients With Moderate and Severe Ischemia: The Case
Gregg W Stone1, Judith S Hochman2, David O Williams3
1Department of Medicine, Columbia University Medical Center, New York Presbyterian Hospital and the Cardiovascular Research Foundation, New York, New York.
Insights
Guideline-directed medical therapy is standard for stable ischemic heart disease. The ISCHEMIA trial investigates if routine revascularization improves outcomes compared to medical therapy alone in patients with moderate-to-severe ischemia.
Area of Science:
- Cardiology
- Clinical Trials
- Ischemic Heart Disease Management
Background:
- Guideline-directed medical therapy (GDMT) is recommended for stable ischemic heart disease (SIHD) to manage atherosclerosis and prevent thrombosis.
- Revascularization is considered for SIHD patients with persistent symptoms despite medical management.
Purpose of the Study:
- To determine if routine revascularization plus GDMT reduces death or myocardial infarction rates compared to GDMT alone in patients with substantial ischemia.
- To evaluate the impact of revascularization strategies on quality of life in SIHD patients with moderate-to-severe ischemia.
Main Methods:
- The ISCHEMIA trial is an ongoing international study comparing medical therapy with an invasive approach (revascularization) in SIHD patients.
- Participants have moderate-to-severe ischemia and medically controlled symptoms.
- Outcomes include death, myocardial infarction, and quality of life.
Main Results:
- Current evidence is insufficient to definitively favor routine revascularization over GDMT alone for SIHD patients with substantial ischemia.
- There is community equipoise regarding the optimal management strategy.
- The ISCHEMIA trial aims to resolve this uncertainty.
Conclusions:
- The optimal management strategy for stable ischemic heart disease with moderate-to-severe ischemia remains uncertain.
- The ISCHEMIA trial is crucial for establishing evidence-based recommendations for invasive versus conservative treatment approaches.
- Further data are needed to guide clinical decision-making in this patient population.
Abstract:
All patients with stable ischemic heart disease (SIHD) should be managed with guideline-directed medical therapy (GDMT), which reduces progression of atherosclerosis and prevents coronary thrombosis. Revascularization is also indicated in patients with SIHD and progressive or refractory symptoms, despite medical management. Whether a strategy of routine revascularization (with percutaneous coronary intervention or coronary artery bypass graft surgery as appropriate) plus GDMT reduces rates of death or myocardial infarction, or improves quality of life compared to an initial approach of GDMT alone in patients with substantial ischemia is uncertain. Opinions run strongly on both sides, and evidence may be used to support either approach. Careful review of the data demonstrates the limitations of our current knowledge, resulting in a state of community equipoise. The ongoing ISCHEMIA trial (International Study of Comparative Health Effectiveness With Medical and Invasive Approaches) is being performed to determine the optimal approach to managing patients with SIHD, moderate-to-severe ischemia, and symptoms that can be controlled medically. (International Study of Comparative Health Effectiveness With Medical and Invasive Approaches [ISCHEMIA]; NCT01471522).
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