颈动脉内膜切除术后脑电图定量变化与缺血的相关性

V. Pedapati, K. Du, A. Mina, A. Bradley, J. Espino, K. Batmanghelich, P. Thirumala, S. Visweswaran
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引用次数: 1

摘要

术中连续监测脑电图(EEG)在颈动脉内膜切除术(CEA)中被常规用于检测脑缺血[1]。视觉观察到的与缺血相关的脑电图变化包括同侧快速频率振幅的下降或同侧慢频率活动的增加。在文献中,显著的脑电图变化被定义为α频段的幅度下降50%或以上,或者θ或δ频段的活动增加50%或以上[2],[3]。与原始脑电相比,定量脑电参数可以增强视觉脑电回顾。QEEG参数通过对原始EEG信号进行傅里叶变换得到功率谱[4]。QEEG参数的例子包括delta、theta、alpha、beta、gamma功率值、alpha功率与delta功率比(ADR)、beta功率与delta功率比(BDR)、alpha- + beta功率与delta- + theta功率比(ABDTR)、频谱边缘频率90% (SEF90)和幅值集成EEG (aEEG)。QEEG参数在相对较少的CEA患者中检测缺血方面已经有研究[5]。在这项研究中,我们报告了大量接受CEA并进行脑电图监测的患者的QEEG参数分析。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Quantitative EEG Changes in Carotid Endarterectomy Correlated with Ischemia
Continuous intraoperative monitoring with electroencephalography (EEG) is routinely used in carotid endarterectomy (CEA) to detect cerebral ischemia [1]. Visually observed changes in EEG related to ischemia include an ipsilateral decrease in amplitude of faster frequencies or an ipsilateral increase in activity of slower frequencies. In the literature, significant EEG change has been defined as a decrease in the amplitude in the alpha frequency band by 50% or greater or an increase in activity in the theta or delta frequency band by 50% or greater [2], [3]. Compared to raw EEG, quantitative EEG (QEEG) parameters can enhance visual EEG review. QEEG parameters are derived by applying Fourier transformation to raw EEG signals to generate power spectra [4]. Examples of QEEG parameters include delta, theta, alpha, beta, gamma power values, alpha power to delta power ratio (ADR), beta power to delta power ratio (BDR), alpha-plus-beta power to delta-plus-theta power ratio (ABDTR), spectral edge frequency 90% (SEF90) and amplitude-integrated EEG (aEEG). QEEG parameters have been previously investigated in detecting ischemia in a relatively small number of patients undergoing CEA [5]. In this study, we report on the analyses of QEEG parameters in a large population of patients who underwent CEA with EEG monitoring.
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