Faught E
Department of Neurology, University of Alabama School of Medicine, Birmingham 35294-0007.
Stroke. 1993 Apr;24(4):609-13. doi: 10.1161/01.str.24.4.609.
The electroencephalogram has been largely supplanted by neuroimaging techniques for the diagnosis and localization of ischemic stroke. However, because of its close correlation with cerebral metabolism and its ability to detect brief transient alterations in cortical function, the electroencephalogram may still be useful for certain diagnostic applications in stroke.
The relation of electroencephalographic phenomena to cerebral blood flow and metabolism is reviewed. Ten clinical questions that can be addressed by the electroencephalogram in patients with stroke are posed. The presence of seizures, confirmation of diagnosis, intraoperative monitoring, and level of consciousness are areas of proven usefulness. The electroencephalogram provides less worthwhile information about the time course, prognosis, and localization of strokes. Computerized techniques are of potential but unproven value.
The electroencephalogram retains a worthwhile place in the evaluation of patients with cerebral ischemia when it is used to answer specific questions. All patients with strokes do not need electroencephalograms, but the test can provide uniquely useful data in some.
在缺血性卒中的诊断和定位方面，脑电图很大程度上已被神经影像学技术所取代。然而，由于脑电图与脑代谢密切相关，且能够检测皮质功能的短暂瞬时改变，因此在卒中的某些诊断应用中可能仍具有价值。
回顾了脑电图现象与脑血流及代谢的关系。提出了卒中患者脑电图可解决的10个临床问题。癫痫发作的存在、诊断的确认、术中监测以及意识水平是已证实其有用性的领域。脑电图在卒中的病程、预后及定位方面提供的信息价值较小。计算机技术具有潜在价值，但尚未得到证实。
当用于回答特定问题时，脑电图在脑缺血患者的评估中仍占有重要地位。并非所有卒中患者都需要进行脑电图检查，但该检查在某些患者中可提供独特的有用数据。
