de Oliveira R de M, Cardeal J O, Lima J G
Universidade Federal de São Paulo (UNIFESP), Escola Paulista de Medicina, Brasil.
Arq Neuropsiquiatr. 1997 Sep;55(3B):558-62. doi: 10.1590/s0004-282x1997000400007.
Ectasia of the basilar artery (EB) occurs when its diameter is greater than normal along all or part of its course, and/or when it is abnormally tortuous. EB may cause cranial nerve dysfunction, ischemic stroke or subarachnoid hemorrhage, pseudotumor or hydrocephalus. We tried to describe cases of stroke associated with EB, analyze its frequency, clinical aspects, and the mechanisms involved in different forms of its presentation. We found 21 patients with stroke and EB. The association between EB and stroke was more prevalent in males over the age of fifty. Main symptoms were hemiparesia, cranial nerves dysfunction, and cerebellar ataxia. Cerebral infarcts associated with EB were due to different mechanisms: arterial thrombosis, artery-to-artery embolism, mass effect with angulation and obstruction of the vertebral and basilar branches.
基底动脉扩张症（EB）是指基底动脉全程或部分管径大于正常，和/或走行异常迂曲。EB可导致脑神经功能障碍、缺血性脑卒中或蛛网膜下腔出血、假瘤或脑积水。我们试图描述与EB相关的脑卒中病例，分析其发生率、临床特征以及不同表现形式所涉及的机制。我们发现了21例伴有EB的脑卒中患者。EB与脑卒中的关联在50岁以上男性中更为普遍。主要症状为偏瘫、脑神经功能障碍和小脑共济失调。与EB相关的脑梗死有不同的机制：动脉血栓形成、动脉到动脉栓塞、占位效应伴椎动脉和基底动脉分支成角及阻塞。
