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Updated: Mar 19, 2026
Surgical Swine Model of Chronic Cardiac Ischemia Treated by Off-Pump Coronary Artery Bypass Graft Surgery
Published on: March 27, 2018
Insights
Coronary artery bypass grafting (CABG) can lead to recurrent ischemia due to graft lesions. Treatments include percutaneous coronary intervention (PCI) or repeat CABG, with drug-eluting stents improving outcomes for saphenous vein graft lesions.
Area of Science:
- Cardiovascular Surgery
- Interventional Cardiology
Background:
- Coronary artery bypass grafting (CABG) is a common procedure, but graft lesions can cause recurrent ischemia.
- Advancements like arterial grafts and off-pump surgery exist, yet graft failure remains a concern.
Purpose of the Study:
- To review the management strategies for recurrent ischemia after CABG.
- To discuss treatment options for early and late graft lesions.
Main Methods:
- Review of literature on CABG complications and interventions.
- Analysis of factors influencing treatment decisions for graft lesions.
Main Results:
- Early ischemia (<30 days) often results from graft occlusion/stenosis, treatable with percutaneous coronary intervention (PCI).
- Late ischemia (>3 years) typically involves saphenous vein graft (SVG) lesions, with treatment depending on graft status and patient factors.
- Drug-eluting stents are effective in reducing restenosis in SVG lesions and are a common interventional strategy.
Conclusions:
- Management of recurrent ischemia post-CABG requires individualized strategies based on timing, graft type, and patient condition.
- PCI is feasible for early lesions, while late SVG lesions may necessitate repeat CABG or PCI.
- Embolic protection and vasodilators are important adjuncts during PCI for SVG lesions.
Abstract:
Coronary artery bypass grafting (CABG) remains one of the most common surgical procedures. In spite of great advancements like arterial grafts and off-pump bypass procedure, recurrent ischaemia may ensue with the lesions of the graft. Early postoperative ischaemia (<30 days) is due to graft occlusion or stenosis, and percutaneous coronary intervention (PCI) is frequently feasible. Late postoperative ischaemia (>3 years) is most often due to a saphenous vein graft (SVG) lesion. Multiple diseased grafts, reduced left ventricular function, and available arterial conduits favour repeat CABG, whereas, a patent left internal mammary artery to left anterior descending favours PCI. Embolic protection reduces atheroembolic myocardial infarction during PCI of SVG and should be routinely used in treatment of SVG lesions. A variety of vasodilators may reduce the risk of or mitigate the consequences of no-reflow. Drug-eluting stents reduce restenosis in SVG grafts, and have become the default strategy for many interventionalists.
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