目的：探讨颈内动脉（ICA）狭窄致发作性意识障碍的临床特点及预后。方法：报道我院1例ICA狭窄 致发作性意识障碍并结合文献进行回顾性分析。结果：该患者以发作性意识障碍起病，症状反复，发作时双 上肢震颤，双下肢无力伴站立及行走不能，血管造影显示左侧颈内动脉起始端重度狭窄，狭窄率约70%。搜 索既往报道的ICA狭窄致发作性意识障碍患者20例，常见临床表现有肢体无力、眩晕及视物模糊等，影像 学表现为单侧或双侧的ICA狭窄或闭塞。结论：临床上，ICA狭窄致发作性意识障碍相对罕见，对反复发作 意识障碍的患者，行头颅MRA或脑血管造影筛查颈内动脉系统病因，做到早发现、早治疗。

To analyze the clinical characteristic and prognosis of recurrent transient losses of consciousness (TLOC) secondary to internal carotid artery (ICA) stenosis. Methods: One case of recurrent TLOC secondary to ICA stenosis at our hospital was reported, and the relevant literature was reviewed. Results: The patient presented with recurrent TLOC, tremor of both upper limbs, and weakness of both lower limbs with inability to stand and walk. Digital subtraction angiography (DSA) showed severe stenosis at the beginning of the left ICA, and the stenosis rate was about 70%. We collected data of 20 cases of TLOC secondary to ICA stenosis from MEDLINE. Common clinical manifestations included weakness, dizziness, and blurred vision. Imaging manifestations were unilateral or bilateral ICA stenosis or occlusion. Conclusion: The loss of consciousness secondary to ICA stenosis is relatively rare. For patients with recurrent TLOC, we recommend screening for causes in the ICA system and performing head MRA or DSA to achieve early detection and treatment.