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

Area of Science:

• Cardiology
• Interventional Cardiology

Background:

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

Purpose of the Study:

• To provide practical guidance on utilizing epicardial collaterals for retrograde CTO PCI.
• To review current devices, techniques, and complication management strategies.

Main Methods:

• Review of current literature and techniques for retrograde CTO PCI via epicardial collaterals.
• Discussion of specialized devices like microcatheters and guidewires.
• Emphasis on operator experience and complication prevention.

Main Results:

• Epicardial collaterals are a valuable alternative route for CTO PCI when septal navigation is not possible.
• Innovations in devices have improved the safety and technical feasibility of this approach.
• Experienced operators can achieve complete revascularization in challenging anatomies using this method.

Conclusions:

• Retrograde CTO PCI via epicardial collaterals is an important option for complex cases where other routes are unavailable.
• Careful technique selection and use of advanced devices are crucial for success and safety.
• This strategy, when performed by experts, expands treatment options for challenging CTOs.