Stable coronary artery disease and left ventricular dysfunction: The role of revascularization

Area of Science:

• Cardiology
• Cardiac Surgery
• Interventional Cardiology

Background:

• Stable coronary artery disease (CAD) with left ventricular (LV) dysfunction presents unique treatment challenges.
• Revascularization strategies aim to improve outcomes in this patient population.
• Existing evidence primarily focuses on surgical interventions like Coronary Artery Bypass Grafting (CABG).

Purpose of the Study:

• To review current evidence on revascularization (CABG and Percutaneous Coronary Intervention - PCI) in patients with stable CAD and LV dysfunction.
• To identify gaps in research concerning contemporary PCI outcomes in this specific patient group.
• To highlight the need for comparative studies on PCI versus CABG.

Main Methods:

• A comprehensive literature review was conducted.
• Included pivotal, high-quality trials investigating revascularization in patients with CAD and LV dysfunction.
• Focused on studies comparing CABG and medical therapy, and examined available data on PCI.

Main Results:

• The Coronary Artery Surgery Study (CASS) showed improved 10-year survival with CABG compared to medical therapy.
• The Surgical Treatment for Ischemic Heart Failure (STICH) trial's long-term follow-up (STICHES) indicated CABG significantly reduced all-cause mortality.
• Evidence on contemporary PCI outcomes in patients with stable CAD and reduced ejection fraction is limited.

Conclusions:

• CABG has demonstrated long-term survival benefits in patients with stable CAD and LV dysfunction.
• There is a significant lack of high-quality comparative data on modern PCI techniques versus CABG in this population.
• Further research, including randomized controlled trials, is essential to compare long-term outcomes of PCI, CABG, and hybrid approaches.