Prognostic Value of Mild Asymptomatic Intracranial Atherosclerotic Stenosis in Patients With Hypertension.

Abstract

Background: Mild asymptomatic intracranial atherosclerotic stenosis (aICAS) is common in Chinese patients with hypertension. However, there are no data on its prognostic value in this population. The aim of the present study was to clarify the prevalence and associated cardiovascular risk factors of mild aICAS and determine its prognostic value for overall and cardiovascular mortality in patients with hypertension.

Methods: In total, 1,813 participants were evaluated for aICAS using computed tomographic angiography. The predictive effect of mild to severe aICAS on all-cause and cardiovascular mortality was evaluated using Kaplan-Meier survival curves and Cox regression analyses.

Results: The prevalence rate of mild aICAS was 35.7%. Poorly controlled hypertension, in combination with diabetes and dyslipidemia, was associated with aICAS. Patients with aICAS had an independently significant increase in the risk of all-cause and cardiovascular death, with adjusted hazard ratios (HRs) for mild to severe stenosis ranging from 1.56 to 3.30 for all-cause death and from 2.48 to 6.38 for cardiovascular death. Among the patients with mild aICAS, only those with more than two stenoses had increased mortality after adjustment, with an HR of 2.44 (95% CI: 1.42-4.18) for total death and 4.49 (95% CI: 1.82-11.05) for cardiovascular death.

Conclusions: A significant association between mild aICAS and mortality in stroke-free patients with hypertension was revealed. The results indicate that mild aICAS might be an imaging marker for cerebrovascular lesions in patients with hypertension and poor control of blood pressure and lipids in this population requires further research.