Sequential coronary artery bypass utilizing the internal mammary artery

Area of Science:

• Cardiovascular Surgery
• Cardiac Surgery
• Vascular Grafting

Background:

• Coronary artery disease necessitates bypass grafting for revascularization.
• The left internal mammary artery (IMA) is a preferred graft for coronary artery bypass grafting (CABG).
• Sequential grafting techniques aim to optimize revascularization with limited arterial conduits.

Purpose of the Study:

• To evaluate the technical feasibility and early clinical outcomes of using the left internal mammary artery (IMA) as a sequential bypass graft.
• To establish guidelines for the optimal application of sequential IMA grafting in coronary artery bypass surgery.

Main Methods:

• Fifty consecutive patients undergoing CABG received sequential bypass grafting using the IMA.
• The IMA was sequentially anastomosed to two or more diseased coronary arteries.
• Specific technical guidelines were followed, including prioritizing the left anterior descending/diagonal arteries and performing distal anastomosis first.

Main Results:

• No perioperative myocardial infarctions occurred in the 50 patients.
• All 50 patients were alive and remained free of angina at 3-5 year follow-up.
• Postoperative angiograms in 11 patients showed no stenosis, occlusion, or late adverse effects.

Conclusions:

• Sequential IMA grafting is a technically feasible and safe procedure for coronary artery bypass surgery.
• Adherence to specific technical guidelines, such as avoiding kinks and prioritizing distal anastomoses, is crucial for success.
• This technique offers excellent long-term clinical outcomes, with patients remaining free of angina and demonstrating patent grafts.