Technical Nuance of Sub 2-mm Middle Cerebral Artery Angioplasty and Stenting

Area of Science:

• Neurology
• Interventional Neurology
• Vascular Neurology

Background:

• Intracranial stenosis is a significant cause of ischemic stroke, particularly in Asian, African, and Hispanic populations.
• Previous trials like SAMMPRIS and WEAVE have shown varying outcomes and complication rates for stenting versus medical management in intracranial stenosis.
• Despite risks, advancements allow for angioplasty and stenting in challenging cases, including small intracranial vessels.

Discussion:

• This case series highlights the technical nuances of performing angioplasty and stenting on intracranial vessels measuring less than 2 mm using submaximal balloon inflation.
• The procedures were performed on patients experiencing recurrent ischemic stroke symptoms despite optimal medical management, including dual antiplatelet therapy and high-dose statins.
• Patient compliance and therapeutic platelet reactivity were confirmed, underscoring the importance of adherence to medical management protocols.

Key Insights:

• Angioplasty and stenting of sub-2-mm intracranial vessels are technically feasible and successful, even in high-risk patients with recurrent ischemic strokes.
• Submaximal balloon inflation is a key technical consideration for successfully treating these small caliber vessels.
• Careful patient selection and optimization of medical management, including antiplatelet and statin therapy, are crucial for favorable outcomes.

Outlook:

• Further research and technical refinements may expand the role of endovascular treatment for complex intracranial stenosis.
• Developing standardized techniques for treating very small intracranial vessels could improve stroke prevention strategies.
• Long-term outcome data from larger cohorts are needed to fully establish the safety and efficacy of stenting in sub-2-mm intracranial vessels.