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An algorithmic approach for the management of ostial right coronary artery chronic total occlusions
Alexandre Avran1, Marouane Boukhris2, Laurent Drogoul1
1Arnault Tzanck Institute, St Laurent du Var Nice, France.
Insights
This study presents an algorithm for treating challenging right coronary artery (RCA) ostial chronic total occlusions (CTOs). The approach details antegrade and retrograde techniques to successfully cross these difficult lesions.
Area of Science:
- Cardiology
- Interventional Cardiology
- Vascular Medicine
Background:
- Treatment of ostial chronic total occlusions (CTOs) in the right coronary artery (RCA) presents significant challenges.
- Contemporary interventional cardiology requires advanced techniques for complex lesion management.
Purpose of the Study:
- To present a structured algorithmic approach for managing ostial RCA CTOs.
- To incorporate current equipment and techniques for successful revascularization.
Main Methods:
- An algorithmic strategy for ostial RCA CTOs, detailing antegrade and retrograde approaches.
- Guidewire crossing techniques, including subintimal re-entry and reverse CART (controlled antegrade and retrograde tracking and dissection).
- Management of cases where guide catheter engagement is not feasible, utilizing primary retrograde approaches with aortic puncture and snaring.
Main Results:
- The proposed algorithm facilitates crossing of challenging ostial RCA CTOs.
- Successful revascularization is achievable through strategic application of antegrade and retrograde techniques.
- Specific techniques like reverse CART and Carlino technique are highlighted for difficult retrograde punctures.
Conclusions:
- An algorithmic approach effectively manages ostial RCA CTOs.
- Integration of antegrade and retrograde strategies optimizes treatment outcomes.
- Advanced techniques are crucial for overcoming challenges in complex coronary interventions.
Abstract:
Treatment of ostial chronic total occlusions (CTOs) of the right coronary artery (RCA) can be challenging. We present an algorithmic approach to the management of such lesions that incorporates all contemporary equipment and techniques. If the RCA ostium can be engaged with a guide catheter then antegrade crossing attempts should be performed. If the antegrade guidewire enters the subintimal space, re-entry into the distal true lumen is performed provided that the antegrade guide catheter provides enough support. If re-entry cannot be achieved, the antegrade wire is left in place to facilitate retrograde recanalization attempts (usually performed using the reverse controlled antegrade and retrograde tracking and dissection-reverse CART-technique). If the RCA ostium cannot be engaged with a guide catheter (for example in flush ostial occlusions) or if the guide catheter does not provide sufficient support, a primary retrograde approach is required, aiming for retrograde guidewire puncture into the aorta, followed by snaring and externalization. Retrograde guidewire puncture can be challenging, requiring use of stiff, highly penetrating guidewires or occasionally use of the Carlino technique. The aforementioned algorithm can facilitate crossing of ostial RCA CTOs.
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