Advanced Imaging of Intracranial Atherosclerosis: Lessons from Interventional Cardiology

Area of Science:

• Neurology
• Interventional Cardiology
• Medical Imaging

Background:

• Intracranial atherosclerosis is a leading cause of ischemic stroke.
• High-grade stenosis carries a significant stroke risk despite medical management.
• Current stenting trials show no definitive benefit, highlighting the need for improved techniques.

Purpose of the Study:

• To explore the potential of intravascular imaging techniques for improving patient selection and procedural outcomes in intracranial stenting.
• To evaluate the role of Fractional Flow Reserve (FFR), Intravascular Ultrasound (IVUS), and Optical Coherence Tomography (OCT) in managing intracranial atherosclerosis.

Main Methods:

• Review of existing literature on FFR, IVUS, and OCT applications in interventional cardiology and their emerging roles in intracranial arteries.
• Analysis of how these imaging modalities can aid in patient selection, plaque characterization, and stent placement.
• Assessment of their potential to reduce periprocedural complications.

Main Results:

• FFR shows promise in predicting stroke risk associated with specific plaques.
• IVUS and OCT are feasible in intracranial arteries, aiding in stenosis quantification, plaque characterization (including vulnerable plaques), and stent deployment.
• OCT can identify perforator vessels, potentially preventing strokes during stenting.

Conclusions:

• Intravascular imaging techniques (FFR, IVUS, OCT) offer potential improvements in patient selection and procedural success for intracranial stenting.
• These methods may help identify vulnerable plaques and optimize stent placement, potentially leading to better outcomes in stroke prevention.
• Further research is warranted to validate the efficacy of these imaging modalities in large-scale clinical trials for intracranial atherosclerosis.