Prevalence of asymptomatic intracranial atherosclerosis in high-risk patients.

Wong, K S; Ng, P W; Tang, A; Liu, R; Yeung, V; Tomlinson, B · Neurology · 2007

cross_sectional · Level IV

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Abstract

We used transcranial Doppler to screen 3,057 patients who had at least one vascular risk factor of hypertension, diabetes, or hyperlipidemia and found 385 (12.6%) had middle cerebral artery stenosis. Elderly, hypertension, diabetes, and hyperlipidemia were associated factors. The prevalence escalated quadratically with increasing number of associated factors: from 7.2% for one, to 29.6% for four associated factors. Asymptomatic middle cerebral artery stenosis is common in patients with vascular risk factors.

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