Cuspineda E, Machado C, Galán L, Aubert E, Alvarez M A, Llopis F, Portela L, García M, Manero J M, Avila Y
Havana Institute of Neurology and Neurosurgery, Cuba.
Clin EEG Neurosci. 2007 Jul;38(3):155-60. doi: 10.1177/155005940703800312.
The objective of our study is to determine the predictive value of QEEG in patients suffering from an acute ischemic cerebral stroke. Twenty-eight patients were studied within the first 72 hours of clinical evolution of middle cerebral artery territory ischemic stroke. Thirty-seven QEEG recordings were obtained: 13 in the first 24 hours after cerebral stroke onset, 9 between 24-48 hours and 15 between 48-72 hours. Absolute Energies (AE) were the QEEG selected variables for statistical analysis: first, AE Z values were calculated using the Cuban QEEG norms, then the maximum and minimum AE Z values were selected within each frequency band and total power. The medians of the five neighboring Z values were also chosen. Regression models were estimated using the RANKIN scores as dependent variables and the selected QEEG variables as independent, then outcome predictions at hospital discharge and 3 months later were calculated. Percentages of concordance and errors between the estimated and real outcome scores were obtained. Alpha and theta AE were the best predictor for short-term outcome and delta AE for long-term outcome. We conclude that QEEG performed within the first 72 hours of ischemic stroke might be a powerful tool predicting short- and long-term outcome.
我们研究的目的是确定定量脑电图（QEEG）对急性缺血性脑卒中患者的预测价值。对28例大脑中动脉供血区缺血性脑卒中临床进展72小时内的患者进行了研究。共获得37份QEEG记录：脑卒中发作后24小时内13份，24 - 48小时内9份，48 - 72小时内15份。绝对能量（AE）是用于统计分析的QEEG选定变量：首先，使用古巴QEEG标准计算AE Z值，然后在每个频段和总功率内选择最大和最小AE Z值。还选取了五个相邻Z值的中位数。以兰金量表评分作为因变量，选定的QEEG变量作为自变量估计回归模型，然后计算出院时和3个月后的预后预测值。得出估计结果与实际结果评分之间的一致性百分比和误差。α和θ频段AE是短期预后的最佳预测指标，δ频段AE是长期预后的最佳预测指标。我们得出结论，在缺血性脑卒中72小时内进行的QEEG检查可能是预测短期和长期预后的有力工具。
