Graft patency in coronary bypass surgery.

Area of Science:

• Cardiovascular Surgery
• Vascular Surgery
• Cardiac Surgery

Background:

• Coronary artery bypass grafting (CABG) is a critical intervention for coronary artery disease.
• Graft selection and surgical technique significantly influence long-term patency and patient outcomes.

Purpose of the Study:

• To evaluate the patency rates of different bypass grafts (vein vs. internal mammary artery) used in CABG.
• To compare the impact of pump oxygenator use versus off-pump techniques on graft patency.
• To assess the effect of endarterectomy on vein bypass graft patency in specific coronary arteries.

Main Methods:

• Retrospective analysis of 514 vein bypass grafts and 49 internal mammary artery grafts in 328 patients.
• Comparison of graft patency rates based on the use of a pump oxygenator.
• Evaluation of vein bypass graft patency with and without endarterectomy in different coronary arteries.

Main Results:

• Vein bypass grafts had a 52% patency rate without a pump oxygenator versus 78% with a pump oxygenator.
• Internal mammary artery grafts demonstrated patency rates of 70% and 86%.
• Vein bypass grafts with endarterectomy showed favorable patency in the left anterior descending (88%) and circumflex (74%) arteries, but not the right coronary artery (59%).

Conclusions:

• The use of a pump oxygenator is recommended for CABG to achieve superior vein graft patency.
• Internal mammary artery grafts offer comparable or better patency rates.
• Endarterectomy does not negatively impact vein bypass graft patency in the left anterior descending and circumflex arteries.