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Background and objective  Symptomatic basilar artery stenosis (BAS) is associated with high risk of ischemic stroke recurrence. We aimed to investigate whether statin therapy might prevent the progression of symptomatic BAS and stroke recurrence.    Methods  We retrospectively analyzed the data of patients with acute ischemia with symptomatic BAS, which was assessed using magnetic resonance angiogram (MRA) imaging on admission day, and 1 year later (or the day of the clinical event). The clinical endpoints were recurrent ischemic stroke and its composites, transient ischemic attack, coronary disease, and vascular death.    Results  Of the 153 patients with symptomatic BAS, 114 (74.5%) were treated with a statin after experiencing a stroke. Statin therapy significantly prevented the progression of symptomatic BAS (7.0% vs 28.2%) and induced regression (22.8% vs 15.4%) compared to non-statin users (p = 0.002). There were 31 ischemic stroke incidences and 38 composite vascular events. Statin users showed significantly lower stroke recurrence (14.9% vs 35.9%, p = 0.05) and composite vascular events (17.5% vs 46.2%; odds ratio [OR], 0.29; 95% confidence interval [CI], 0.13–0.64) than those not using statins did. Recurrent stroke in the basilar territory and composite vascular events were more common in patients with progression of BAS than they were in other patients (OR, 5.16; 95% CI, 1.63–16.25 vs OR, 4.2; 95% CI, 1.56–11.34).    Conclusion  Our study suggests that statin therapy may prevent the progression of symptomatic BAS and decrease the risk of subsequent ischemic stroke. Large randomized trials are needed to confirm this result.

Effect of statin on progression of symptomatic basilar artery stenosis and subsequent ischemic stroke