Global Chronic Total Occlusion Crossing Algorithm: JACC State-of-the-Art Review

Area of Science:

• Cardiology
• Interventional Cardiology
• Vascular Medicine

Background:

• Chronic total occlusions (CTOs) pose significant challenges in percutaneous coronary intervention.
• Successful CTO crossing is crucial for improving myocardial perfusion and patient prognosis.
• Existing strategies for CTO crossing lack a standardized, comprehensive approach.

Purpose of the Study:

• To develop and present a systematic, 10-step algorithm for navigating and crossing complex chronic total occlusions.
• To provide a structured framework for interventional cardiologists facing challenging CTO cases.
• To enhance the success rates and safety of CTO interventions.

Main Methods:

• The algorithm integrates dual angiography, detailed angiographic review (cap morphology, distal vessel, collaterals), and advanced techniques.
• It incorporates intravascular ultrasound (IVUS), retrograde approaches, and specific wiring strategies for challenging segments.
• The algorithm includes decision points for strategy modification, investment procedures, and criteria for procedural termination.

Main Results:

• The proposed algorithm offers a stepwise approach to address various CTO complexities, from proximal cap ambiguity to distal vessel issues.
• It emphasizes the feasibility of retrograde crossing through diverse collateral pathways.
• The algorithm guides operators on when to adapt strategies or cease procedures based on safety and efficacy parameters.

Conclusions:

• This comprehensive 10-step algorithm provides a robust strategy for improving chronic total occlusion crossing success.
• Its structured approach can enhance procedural efficiency, reduce complications, and expand treatment options for CTO patients.
• The algorithm serves as a valuable tool for training, research, and collaborative efforts in interventional cardiology.