Sequential coronary bypass grafts. Long-term follow-up.

Area of Science:

• Cardiovascular Surgery
• Vascular Anastomosis
• Coronary Artery Bypass Grafting

Background:

• Sequential venous coronary bypass grafts present challenges, often linked to differing patency rates between side-to-side and end-to-side anastomoses.
• Understanding these differences is crucial for optimizing graft outcomes.

Purpose of the Study:

• To compare the patency rates of sequential versus single venous coronary artery bypass grafts.
• To evaluate the impact of anastomosis type (side-to-side vs. end-to-side) on graft patency.

Main Methods:

• A 13-year study analyzing 212 sequential "double" grafts and 424 control single grafts.
• Comprehensive angiographic follow-up at early, 1-year, and 5-year intervals.
• Specific focus on diagonal coronary artery-anterior descending coronary artery sequential grafts.

Main Results:

• Side-to-side anastomoses demonstrated significantly better patency rates compared to end-to-side anastomoses in both sequential and single grafts.
• While sequential grafts theoretically offer higher combined patency, the differences were marginal.
• A risk of compromising distal myocardial perfusion exists with sequential grafts.

Conclusions:

• Single vein grafts are generally preferable to sequential grafts for coronary artery bypass.
• Anastomosis technique (side-to-side) is a critical determinant of graft patency.
• Consideration of conduit availability and aortic conditions may necessitate sequential grafts in specific cases.