Retrograde CTO PCI via Epicardial Collaterals: Techniques, Tools, and Risk Mitigation

Area of Science:

• Interventional Cardiology
• Vascular Surgery

Background:

• Retrograde percutaneous coronary intervention (PCI) for chronic total occlusions (CTOs) is a complex procedure.
• Septal collaterals are preferred for safety due to their intramuscular course.
• Epicardial collaterals offer an alternative when septal routes are not feasible.

Purpose of the Study:

• To provide practical guidance on retrograde CTO PCI via epicardial collaterals.
• To outline current devices and techniques for this challenging procedure.
• To offer recommendations for complication prevention and management.

Main Methods:

• Review of current literature and techniques for retrograde CTO PCI.
• Focus on the use of epicardial collateral pathways.
• Discussion of specialized devices like microcatheters and guidewires.

Main Results:

• Innovations in devices have improved the safety and technical feasibility of epicardial CTO PCI.
• Retrograde CTO PCI via epicardial collaterals is a valuable option for complex anatomies.
• Experienced operators can achieve successful revascularization using this approach.

Conclusions:

• Epicardial collaterals are an important alternative for retrograde CTO PCI when other routes fail.
• Advanced devices and techniques enhance safety and success rates.
• This strategy allows complete revascularization in challenging CTO cases.