Has collateral blood flow any effect on restenosis rate? Our experience

Area of Science:

• Neurology
• Cardiovascular Medicine
• Interventional Radiology

Background:

• Restenosis is a key challenge impacting the efficacy of percutaneous transluminal angioplasty and stenting for intracranial atherosclerotic stenosis.
• Understanding predictors of restenosis is vital for improving patient outcomes.

Purpose of the Study:

• To investigate the association between recruitable collateral flow and restenosis in patients treated with percutaneous transluminal angioplasty and stenting for intracranial atherosclerotic stenosis.
• To identify independent risk factors for restenosis.

Main Methods:

• Retrospective analysis of 99 patients with symptomatic severe intracranial atherosclerotic stenosis (≥70%) who underwent percutaneous transluminal angioplasty and stenting.
• Comparison of baseline data, perioperative events, and follow-up results between patients with and without restenosis.
• Binary logistic regression analysis to identify restenosis predictors.

Main Results:

• Collateral circulation and residual stenosis were identified as independent risk factors for restenosis.
• Restenosis risk increased significantly with higher collateral circulation grades and residual stenosis percentages.
• The optimal residual stenosis rate to minimize restenosis risk was found to be 15.85%.

Conclusions:

• Good collateral circulation is significantly associated with increased restenosis risk following intracranial angioplasty.
• Maintaining a residual stenosis rate of approximately 15.85% may help reduce restenosis risk.
• Patients without restenosis exhibited a lower risk of stroke during follow-up.