脑电图相对波段功率对急性脑梗死的诊断价值

目的：探讨脑电图（EEG）相对波段功率（RBP）在急性脑梗死的早期诊断价值。方法：对急性颈内动脉系统脑梗死患者38例，其中局灶性脑梗死组20例，大面积脑梗死组18例，其他疾病对照组30例进行床旁EEG监测。观察梗死部位脑区与对侧脑区、梗死侧枕部与健侧枕部的RBP变化，比较颈内动脉系统脑梗死局灶性脑梗死、大面积脑梗死各组与对照组的RBP差异。结果：梗死部位脑区与对侧脑区比较：梗死组RBP在双侧脑区呈现不对称性，病灶部位脑区8波RBP较对侧显著增大，a、B波的RBP显著减低；局灶组病灶部分脑区0波RBP较对侧显著增大，大面积梗死组0波RBP双侧对比差异无统计学意义。与其他疾病组比较：梗死组梗死脑区均表现为6、0波RBP增大，a、G波RBP减低。扰部RBP变化：两组不同面积脑梗者，梗死侧枕部较健侧枕部8、0波RBP增大，a、B波RBP降低；健侧枕部RBP与其他疾病，大面积组表现为6、0波RBP增大，n、口波RBP降低，局灶组中．除0波RBP轻微增高外，6、a、口波RBP比较差异均无统计学意义。结论：脑电图RBP对于急性颈内动脉系统脑梗死具有早期定侧价值，结合枕部RBP变化，可早期鉴别大面积脑梗死。

Diagnostic value of the relative band power of EEG in patients with acute cerebral infarc- tion

Objective：To investigate the diagnostic value of the relative band power （RBP） of EEG in acute cerebral infarction. Methods：EEG was performed in 38 patients with acute cerebral infarction of internal carotid artery system（Infarction group including 20 cases of focal cerebral infarction and 18 cases of large area cerebral infarction） and the control group of 30 cases was involved. The changes of bilateral RBP were analyzed comparatively, in the infarct brain regions and occipital brain areas RBP in the acute cevebral infaction of internal carotid artery system, focal cerebral infarction and large area cerebral infarc- tion were compared with that in the control group. Results： In comparison of infarction regions with con- tralateral regions：the RBP of infarction group showed bilateral asymmetry. The RBP of ~ waves on the infard side were significantly higher than that on the normal side and the RBPs of a,13 waves decreased significantly;In the focal group~the 0 waves of the infarct side were significantly higher than that on the normal side,while there was no significant statistical difference in the large area group. The 0,~3 waves of the infarct brain area in the two infarction groups increased significantly compared wtih the control group while the RBPs of a,~ waves decreased significantly. The changes of relative band power（RBP）in the oc- cipitalia：infarction the of showed the two groups asymmetry on all the wave-band RBPs in the bilateral occipitalia. The RBP of 8,0 waves on the infarction side were significantly higher than that on the normal