早期诊断标准: 短暂性脑缺血发作(TIA)系指脑局部一过性缺血所致的局灶性神经症状,于24小时内症状完全消失。TIA是临床概念并无病理意义,CT扫描有的也可见到脑梗塞灶。可分为颈内动脉系统TIA和椎—基底动脉系统TIA两类。可作为诊断标准的临床症状如表1所示。这些症状可单独出现或几个症状同时出现。当出现暂短的局灶性神经症状应与血压降低时的脑缺血所致的意识丧失加以区别。诊断TIA,要注意除外与本病容易混淆的其他症状,如:①失神、意识障碍;②意识障碍伴有视力障碍;③进行性的运动和 Early diagnostic criteria: Transient ischemic attack (TIA) refers to the focal neurological symptoms caused by transient ischemic brain ischemia, the symptoms disappear completely within 24 hours. TIA is a clinical concept and no pathological significance, some CT scan can be seen cerebral infarction. Can be divided into internal carotid artery system TIA and vertebral - basilar artery system TIA two categories. The clinical symptoms that can be used as a diagnostic criteria are shown in Table 1. These symptoms can appear alone or in several symptoms at the same time. When present, transient focal neurological symptoms should be distinguished from loss of consciousness due to cerebral ischemia at reduced blood pressure. Diagnosis of TIA, should pay attention to the disease easily confused with other symptoms, such as: ① absence, disturbance of consciousness; ② disturbance of consciousness accompanied by visual impairment; ③ progressive exercise and