Beyond complete myocardial revascularization: is it important and does it matter?

Area of Science:

• Cardiovascular Surgery
• Interventional Cardiology
• Vascular Biology

Background:

• Coronary artery bypass grafting (CABG) is a common treatment for coronary artery disease.
• The practice of performing multiple grafts per coronary system (left anterior descending, circumflex, right) has been prevalent, aiming for long-term freedom from major adverse coronary events.
• However, the scientific literature lacks robust documentation supporting the necessity of maximizing bypass grafts beyond one per system.

Purpose of the Study:

• To evaluate the evidence supporting the practice of maximizing the number of coronary artery bypass grafts per system.
• To identify limitations in existing literature regarding graft number and clinical outcomes.
• To highlight the need for detailed analysis of revascularization strategies based on coronary anatomy.

Main Methods:

• Review of existing medical and surgical literature on coronary artery bypass grafting.
• Analysis of published series regarding patient cohorts, follow-up duration, and clinical endpoints.
• Identification of gaps in studies stratifying outcomes by detailed coronary vessel anatomopathologic inventory and revascularization strategy.

Main Results:

• The medical and surgical literature does not adequately document the importance of maximizing coronary artery bypass grafts beyond one per system.
• Published studies show significant variation in patient populations, follow-up periods, and the range of clinical endpoints assessed.
• No published series provide subset stratification analysis linking detailed coronary vessel pathology to revascularization strategy and outcomes.

Conclusions:

• The presumed benefit of maximizing coronary artery bypass grafts per system is not well-supported by current evidence.
• Existing literature is limited by heterogeneity and a lack of comprehensive endpoint analysis.
• Further research is needed to analyze revascularization strategies based on detailed coronary anatomy and patient-specific factors.