Pattern of cerebrovascular atherosclerotic stenosis in older Chinese patients with stroke.

The clinical pattern and angiographic distribution of cerebral atherosclerosis varies among different ethnic groups. This study was designed to identify the clinical background for intracranial and extracranial atherosclerotic stenosis in older eastern Chinese patients using digital subtraction angiography. We retrospectively reviewed the data collected from the Nanjing Stroke Registry Program, from January 2004 to March 2011. The analysis focused on the intracranial or extracranial location of stenosis in the anterior and posterior circulations. In total, records of 1041 patients were included in the study. Of these patients, 19.88% had intracranial carotid stenosis, 18.73% had stenosis in the extracranial vessels, and 33.33% had concurrent stenoses. A total of 2002 stenotic sites were detected in 749 patients. Among those patients with stenosis, a single stenosis was found in 170 (16.33%) and multiple stenoses were found in 579 (55.62%). The prevalence of intracranial stenosis in the single-stenosis group was 54.12%, while in the multiple-stenosis group it was 47.87% (p=0.127). A higher incidence of severe stenosis (70-99% blockage) and occlusion was found in the intracranial vessels than in the extracranial vessels (p=0.018). Older Chinese patients with atherosclerotic stenosis tend to have more intracranial stenoses.