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目的:探讨不同部位脑梗死导致血管性痴呆的脑电图表现差异,为血管性痴呆的诊断分类提供客观依据。方法:80例诊断血管性痴呆的患者根据影像学表现分为多灶梗死后痴呆和关键部位梗死后痴呆。入选患者均于饱餐后2小时给予常规18导脑电图检查,记录时间为30分钟以上。结果:1多灶梗死后痴呆多表现为α节律减慢,6-8Hz为主;波幅低,以20-25Uv为主,α波频率调节差、节律不规则。低波幅θ波出现者27例,占71.1%,出现于各导联,出现δ波者17例,占44.7%。2关键部位梗死后痴呆的患者中,正常为6例,占13%。异常者39例,占87%。EEG改变主要表现为α指数减少,节律以7-9Hz为主的患者28例,占71.8%。低波幅θ波出现者17例,以前额为主,占43.6%。39例患者未出现δ波。结论:不同部位梗死后血管性痴呆的脑电图表现不尽相同,可以为血管性痴呆的分类诊断提供客观依据。
Objective: To investigate the differences of EEG in vascular dementia caused by cerebral infarction in different parts, and to provide an objective basis for the diagnosis and classification of vascular dementia. Methods: Eighty patients with vascular dementia were divided into post-infarction dementia and multi-focal infarct dementia according to the imaging findings. Selected patients were given routine 18-lead EEG examination 2 hours after the meal, recording time is more than 30 minutes. Results: 1 After multi-focal infarction, dementia manifested as a slower rhythms of a-rhythms, with 6-8Hz dominant; low amplitude of 20-25Uv, poor regulation of a-wave frequency and irregular rhythm. There were 27 cases of low-amplitude θ-wave, accounting for 71.1%, appeared in the lead, 17 cases appeared δ wave, accounting for 44.7%. 2 key areas of patients with post-infarction dementia, normal to 6 cases, accounting for 13%. Abnormalities in 39 cases, accounting for 87%. EEG changes are mainly manifested as a decrease in α index, rhythm 7-9Hz mainly in patients with 28 cases, accounting for 71.8%. 17 cases of low amplitude Θ wave appeared, with the forehead as the main, accounting for 43.6%. 39 patients did not appear δ wave. Conclusion: EEG of different parts of vascular dementia after infarction are not the same, which can provide an objective basis for the classification of vascular dementia.