Results of revascularization in patients with severe left ventricular dysfunction

Area of Science:

• Cardiovascular Surgery
• Cardiac Surgery Outcomes
• Left Ventricular Dysfunction Management

Background:

• Coronary artery disease with severe left ventricular dysfunction presents surgical challenges.
• Traditional patient selection for bypass grafting may exclude those with ejection fractions below 20%.

Purpose of the Study:

• To evaluate the safety and efficacy of coronary artery bypass grafting (CABG) in patients with ejection fraction < 20%.
• To assess the impact of temperature mapping-guided cardioplegia on outcomes in this high-risk group.

Main Methods:

• Prospective data collection from 125 consecutive patients with ejection fraction < 20%.
• Comparison with case-matched controls receiving standard cardioplegia.
• Temperature mapping guided an integrated approach to cold cardioplegia during surgery.

Main Results:

• The study group (temperature mapping) showed significantly lower hospital morbidity (15% vs. 30%) and mortality (4% vs. 11%) compared to controls.
• Five-year actuarial survival was 72% in the study group.
• Significant improvement in anginal and heart failure symptoms was observed among survivors.

Conclusions:

• Coronary artery bypass grafting is feasible and beneficial for patients with severe left ventricular dysfunction, irrespective of viability studies or distal vessel visualization.
• Temperature mapping-guided cardioplegia is associated with reduced hospital morbidity and mortality.
• The procedure offers encouraging long-term survival and symptomatic improvement for this challenging patient population.