Objective: Intracranial artery occlusive disease including middle cerebral artery and extracranial carotid artery occlusive disease are major causes of ischemic stroke.
目的：包括大脑中动脉在内的颅内大动脉和颅外颈动脉狭窄是缺血性脑卒中的常见原因。
Conclusion carotid artery ultrasonography can directly show the extracranial carotid canal disease and determine accurately the narrow extent of carotid artery.
结论颈动脉超声可直接显示颅外段颈动脉管壁病变，并能较准确判定颈动脉狭窄程度。
The local stenosis rate of extracranial carotid artery in patients with ischemic cerebrovascular disease now is higher than that in the past.
本地缺血性脑血管病病人颅外颈动脉狭窄率较以往有增加。
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