Quadruple coronary artery bypass grafting

Area of Science:

• Cardiovascular Surgery
• Cardiac Surgery Outcomes
• Interventional Cardiology

Background:

• Complex coronary artery disease often requires extensive bypass grafting.
• Patients with severely impaired left ventricular function (low ejection fraction or elevated left ventricular end-diastolic pressure) are often considered high-risk for revascularization.

Purpose of the Study:

• To evaluate the safety and efficacy of myocardial revascularization in patients requiring 4 or more bypass grafts.
• To determine if preoperative low ejection fraction or elevated left ventricular end-diastolic pressure are contraindications to revascularization.

Main Methods:

• Retrospective analysis of 150 consecutive revascularization operations.
• Detailed review of patient demographics, preoperative cardiac function (ejection fraction, left ventricular end-diastolic pressure), surgical procedures, and postoperative outcomes.
• Assessment of mortality, return to work, and functional improvement using New York Heart Association criteria.

Main Results:

• 30 patients (20%) received 4 or more bypass grafts.
• Mortality was 3% in the quadruple grafting group (1 death in 30 patients).
• 75% of survivors returned to work, and 86% showed improved cardiac function postoperatively.
• 50% of patients had preoperative diminished ejection fraction or elevated left ventricular end-diastolic pressure, or both.

Conclusions:

• Complete myocardial revascularization, including ventricular aneurysm resection when necessary, is feasible and successful in high-risk patients.
• Diminished ejection fraction and elevated left ventricular end-diastolic pressure are not absolute contraindications for myocardial revascularization.