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Updated: May 18, 2026

Surgical Porcine Model of Chronic Myocardial Ischemia Treated by Exosome-laden Collagen Patch and Off-pump Coronary Artery Bypass Graft
Published on: September 15, 2023
Left main percutaneous coronary intervention
Paul S Teirstein1, Matthew J Price
1Scripps Clinic and Scripps Translational Science Institute, La Jolla, California, USA.
Insights
Percutaneous coronary intervention (PCI) is increasingly accepted for unprotected left main disease, especially in high-surgical-risk patients. Recent trials offer insights into PCI versus coronary artery bypass graft (CABG) safety and efficacy.
Area of Science:
- Cardiovascular Medicine
- Interventional Cardiology
- Vascular Surgery
Background:
- Unprotected left main coronary artery disease traditionally required surgical intervention.
- Advances in drug-eluting stents and catheter techniques have improved percutaneous coronary intervention (PCI) outcomes.
- PCI is emerging as a viable alternative to coronary artery bypass graft (CABG) for select patients.
Purpose of the Study:
- To review current data comparing PCI and CABG for unprotected left main disease.
- To summarize recent guideline recommendations for revascularization strategies.
- To update on technical considerations for optimizing left main PCI outcomes.
Main Methods:
- Review of randomized trials comparing PCI and CABG for unprotected left main disease.
- Analysis of current clinical guidelines and expert recommendations.
- Synthesis of technical aspects influencing left main PCI success.
Main Results:
- PCI is considered reasonable for patients with low-to-intermediate anatomic complexity and high surgical risk.
- Randomized trial data provide novel insights into the relative safety and efficacy of PCI versus CABG.
- Technical considerations are crucial for optimizing clinical outcomes in left main PCI.
Conclusions:
- PCI is a growing alternative to CABG for unprotected left main disease in appropriate patient subsets.
- Guideline recommendations support considering PCI for high-risk surgical patients.
- Continued research and technical refinement are essential for advancing left main PCI.
Abstract:
The introduction of drug-eluting stents and advances in catheter techniques have led to increasing acceptance of percutaneous coronary intervention (PCI) as a viable alternative to coronary artery bypass graft (CABG) for unprotected left main disease. Current guidelines state that it is reasonable to consider unprotected left main PCI in patients with low to intermediate anatomic complexity who are at increased surgical risk. Data from randomized trials involving patients who are candidates for either treatment strategy provide novel insight into the relative safety and efficacy of PCI for this lesion subset. Herein, we review the current data comparing PCI with CABG for left main disease, summarize recent guideline recommendations, and provide an update on technical considerations that may optimize clinical outcomes in left main PCI.
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