【摘要】 本文对１０４例短暂性脑缺血发作（ＴＩＡ）的患者进行了ＣＴ和（或）ＭＲＩ检查，发现脑梗塞２８例（２６．９％），其中５０例颈内动脉系ＴＩＡ患者发现梗塞１９例（３８．０％），５４例椎基底动脉系ＴＩＡ患者发现梗塞９例（１６．７％）。对后组病人拍颈椎片均显示不同的改变，三维多普勒（ＴＣＤ）均显示椎基底动脉痉孪。因此结合文献考虑颈内动脉系的ＴＩＡ病因主要是微栓子，发生脑梗塞率较高，而椎基底动脉系ＴＩＡ病因主要是血管痉挛，发生脑梗塞率低。由于ＴＩＡ患者的脑梗塞率达２６．７％～７７％。故认为，ＴＩＡ的概念除传统的突然发作、持续时间短暂、症状体征在２４小时内完全消失及可以反复发作外，应加上影像学可见脑组织有小的软化灶这一现象，以统一临床与影像学之间的关系。更多还原

【Abstract】 CT or MRI test was carried out to 104 patients with transient ischemic attack(TIA),28 cases with cerebral infarction were found among them, 19(38.0%)of 28 caseswere found in 50 cases with TIA of internal carotid artery system,9(16.7%)were found in54 cases with TIA of vertebra basilar system.The later patients X-rayed to cervical vertebraedisplayed an abnormality. TCD to them also displayed vertebra basilar spasm. So the etiolo-gy of the patients with TIA of internal carotid artery system is mainly the microemboluscombined with other literatures.The incidence of cerebral infarction was higher,while theetiology of the patients with TIA of vertebra basilar system was mainly blood spasm. The in-cidence of cerebral infarction was lower.Due to the incidence of cerebral infarction being26.7%～77.0%displayed by CT to TIA patients,besides the traditonal sudden attack,las-ting in short time,system signs completely disappering in 24 hours and repeated attacks easi-ly,the concept of TIA shoud and image visible brain tisue small malacic foci to unificate therelationship between clinic and image.更多还原