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Endarterectomy of the left anterior descending coronary artery
1Sunnybrook Health Science Centre, University of Toronto, Ontario, Canada.
Insights
Coronary artery endarterectomy for extensive disease, particularly in the left anterior descending artery (LAD), is a viable surgical option. This procedure does not increase perioperative risk compared to standard coronary artery bypass grafting.
Area of Science:
- Cardiovascular Surgery
- Interventional Cardiology
- Vascular Biology
Background:
- Extensive coronary artery disease (CAD) poses challenges for surgical revascularization.
- Diffuse atherosclerosis in the left anterior descending (LAD) artery often necessitates endarterectomy to improve graft patency.
- Endarterectomy can be a planned or emergent procedure during coronary artery bypass grafting (CABG).
Purpose of the Study:
- To evaluate the role and safety of LAD endarterectomy in patients with extensive CAD.
- To compare perioperative risks of LAD endarterectomy versus standard CABG.
Main Methods:
- Description of surgical techniques for LAD endarterectomy, including local and total endarterectomy.
- Closure methods involving vein patches for arteriotomy.
- Comparison of perioperative outcomes between patients undergoing LAD endarterectomy and those undergoing CABG alone.
Main Results:
- LAD endarterectomy can be performed via different approaches (local or total) depending on disease extent.
- Vein patches are utilized for closure after endarterectomy, accommodating grafts like internal mammary artery (IMA) or saphenous vein.
- No significant increase in perioperative risk was observed for LAD endarterectomy compared to standard CABG.
Conclusions:
- LAD endarterectomy is a feasible and safe adjunct to CABG for managing extensive coronary atherosclerosis.
- The procedure can be tailored to the specific disease pattern, offering improved revascularization.
- Surgeons can confidently consider LAD endarterectomy without a substantial increase in patient risk.
Abstract:
Increasing numbers of patients with extensive coronary artery disease present for surgical revascularization. Diffuse atherosclerosis of the anterior descending artery remains a significant challenge and endarterectomy may be required to increase graft outflow. A surgeon may choose local endarterectomy or be accidentally forced into endarterectomy when attempting to split a lesion distal to a critical stenosis. Distal traction endarterectomy may be performed through a medium sized arteriotomy and closed with a vein patch, to which an internal mammary artery (IMA) or saphenous vein graft is constructed. More diffuse disease, or the breaking of an endarterectomy specimen, may require a direct vision total endarterectomy of the entire length of the left anterior descending coronary artery (LAD), which is then closed by a long vein patch. The IMA is not usually grafted to such an extensive reconstruction. There has not been an increase in perioperative risk from LAD endarterectomy when compared to patients undergoing coronary artery bypass grafting without endarterectomy.