Incidence and Risk Factors of In-Stent Restenosis for Symptomatic Intracranial Atherosclerotic Stenosis: A Systematic Review and Meta-Analysis.

Abstract

BACKGROUND:

In-stent restenosis affects long-term outcome in patients with intracranial atherosclerotic stenosis.

PURPOSE:

The aim of this meta-analysis was to evaluate the incidence and risk factors of in-stent restenosis.

DATA SOURCES:

All literature that reported in-stent restenosis was searched on PubMed, Ovid EMBASE and Ovid MEDLINE data bases.

STUDY SELECTION:

Original articles about stents for symptomatic intracranial atherosclerotic stenosis were selected.

DATA ANALYSIS:

Meta-analysis was conducted to derive the pooled in-stent restenosis using a random-effects model. Meta-regression was performed to explore the risk factors predisposing to in-stent restenosis.

DATA SYNTHESIS:

In total, 51 studies with 5043 patients were included. The pooled incidence rate of in-stent restenosis was 14.8% (95% CI, 11.9%-17.9%). Among the lesions with in-stent restenosis, 28.8% of them led to (95% CI, 22.0%-36.0%) related neurologic symptoms. The series in the United States had a higher in-stent restenosis rate (27.0%; 95% CI, 20.6%-33.9%) compared with those from Asia (13.6%; 95% CI, 10.3%-17.2%) and other regions as a whole (7.6%; 95% CI, 1.1%-18.1%) (P < .01). Multiregression analysis revealed that younger patient age was related to high in-stent restenosis rates (P = .019), and vertebrobasilar junction location (P = .010) and low residual stenosis (P = .018) were 2 independent risk factors for symptomatic in-stent restenosis rate.

LIMITATIONS:

The heterogeneity of most outcomes was high.

CONCLUSIONS:

Our study showed promising results of in-stent restenosis for symptomatic atherosclerotic stenosis. Studies are needed to further expatiate on the mechanisms by which younger patient age, vertebrobasilar junction location, and low residual stenosis could increase in-stent restenosis and symptomatic in-stent restenosis, respectively.

• Authors: G Peng, Y Zhang, Z Miao
• Journal: AJNR. American journal of neuroradiology (AJNR Am J Neuroradiol) Vol. 41 Issue 8 Pg. 1447-1452 (08 2020) ISSN: 1936-959X [Electronic] United States
• PMID: 32732271 (Publication Type: Journal Article, Meta-Analysis, Systematic Review)
• Copyright: © 2020 by American Journal of Neuroradiology.

Topics

• Aged
• Endovascular Procedures (methods)
• Female
• Humans
• Incidence
• Intracranial Arteriosclerosis (complications, surgery)
• Ischemic Stroke (etiology)
• Male
• Middle Aged
• Postoperative Complications (epidemiology, etiology)
• Recurrence
• Risk Factors
• Stents
• Treatment Outcome