Intravascular Ultrasound in Chronic Total Occlusion Percutaneous Coronary Intervention: Solving Ambiguity and...

Area of Science:

• Cardiovascular Interventions
• Medical Imaging
• Interventional Cardiology

Background:

• Chronic total occlusions (CTO) present significant technical challenges in percutaneous coronary interventions.
• Traditional 2-dimensional angiography has limitations in visualizing complex CTO morphology.
• Intravascular imaging offers advanced insights beyond conventional angiography.

Purpose of the Study:

• To review the practical applications of intravascular imaging, specifically intravascular ultrasound (IVUS), in managing CTO.
• To highlight how IVUS aids in overcoming technical difficulties associated with CTO treatment.
• To demonstrate the utility of IVUS throughout the entire percutaneous recanalization process for CTO.

Main Methods:

• This review synthesizes current literature and clinical experience on the use of IVUS in CTO interventions.
• Focuses on practical scenarios and decision-making processes guided by IVUS.
• Describes techniques for guidewire navigation, lesion assessment, and procedural optimization using IVUS.

Main Results:

• IVUS provides critical lesion characteristics (e.g., length, calcification, thrombus) essential for CTO treatment planning.
• IVUS facilitates guidewire crossing by differentiating between intraplaque and extralumenal pathways.
• Real-time IVUS visualization can minimize inadvertent extraplaque guidewire advancement, reducing complications.

Conclusions:

• Intravascular ultrasound is indispensable for successful percutaneous treatment of complex CTOs.
• IVUS optimizes every stage of CTO intervention, from guidewire crossing to post-stent assessment.
• Integrating IVUS into CTO procedures improves procedural success and potentially reduces adverse events.