Characteristics of electroencephalograph in cerebral infarction patients with subsequent vascular dementia

Abstract

Clinical data of 65 patients with acute cerebral infarction (frontal or temporal or both lobes) treated in our hospital during 2015—2016 were retrospectively reviewed.The patients were followed up for 6 months, 34 cases were diagnosed as vascular dementia (VD) according to ICD-10 (VD group) and 31 cases were diagnosed as simple cerebral infarction (control group). The abnormal rate of electroencephalograph (EEG) at baseline in VD group was significantly higher than that in control group (χ2=5.44, P=0.02). Compared to control group, the powers of slow wave (θ wave and δ wave) at baseline, third month and sixth month in VD group were significantly increased (Fbetween groups=17.39, Finner groups=163.50, Finteraction=38.71; all P=0.00) and (Fbetween groups=5.10, Finner groups=119.04, Finteraction=6.54; P<0.05). Compared to baseline, the α wave and β wave were significantly decreased at third month and sixth month in VD (Finner groups=116.40, P=0.00) and (Finner groups=55.90, P<0.05). Compared to control group, the powers of θ wave (except in the frontal lobe at baseline and third month) and δ wave were significantly increased at all time points (P<0.05). Except the θ wave in occipital lobe, there were significant differences in slow wave at all time points between VD group and control group (P<0.05). The featured EEG with increased slow wave in many regions of cerebral infarction can be used for early diagnosis of VD in patients with cerebral infarction. Key words: Vascular dementia; Cerebral infarction; Electroencephalograph