小脑前下动脉梗死的临床与磁共振成像的研究

目的 研究小脑前下动脉(AICA)梗死的临床表现及磁共振成像(MRI)特征。方法 对我院1997年1月～2001年6月4年半间通过磁共振成像(MRI)确诊的19例AICA梗死患者进行临床及MRI观察。结果AICA梗死占同期急性脑梗死的1.47％,占同期小脑梗死22.1％。危险因素与一般缺血性脑卒中午相似,即高血压、高脂血症、糖尿病是其主要的危险因素。所有患者均有眩晕及小脑性共济失调的症状体征;除一名患者外均有颅神经受累,以Ⅷ、Ⅶ、v最多见。第Ⅶ颅神经受累是AIcA梗死的一个特征性改变。AICA梗死预后较好。结论 AICA梗死并非罕见,应提高对AICA梗死临床表现及MRI特征的认识,以降低临床误诊率。

Clinical manifestation and MRI study of the anterior inferior cerebellar artery infarcts

Objective To investigate the clinical manifestations and MRI feature of AICA infarcts. Methods We studied 19 patients with AICA infarcts diagnosed by MRI who were admitted to the First Affiliated Hospital of China Medical University from 1997 to June, 2001. Results AICA infarcts constituted 1. 47% of all the patients with acute brain infarction and 22. 1% of the cerebellar infarcts at the same time. The backgrounds and risk factors were similar to those of patients with ischemic stroke, hypertension, hypercholestrol and diabetes mellitus were the main risk factors. All patients had the symptom of vertigo and the signs of cerebellar ataxia. All but one had the cranial nerve involvement, including VI, VI , V , and the injury of VH cranial nerve was the characteristic change of AICA infarcts. The outcome of AICA infarcts was very good. Conclusion AICA infarcts are more common than previously thought. In order to reduce the rate of misdiagnosis > the clinical manifestations and MRI feature of AICA infarcts should be well recognized.