Introduction. Posterior reversible encephalopathy syndrome (PRES) is a relatively common cause of encephalopathy in the hospital setting, and the EEG findings have not been well described. The purpose of this study was to review the EEG findings in a series of patients with PRES. Methods. We retrospectively reviewed our electronic medical record database to identify patients who received a diagnosis of PRES at Tampa General Hospital from January 2016 to October 2017. The diagnosis of PRES was suspected on clinical presentation and confirmed by magnetic resonance imaging. We selected patients with PRES who had received at least 1 EEG. EEGs were interpreted by 2 board-certified electroencephalographers. Results. From January 2016 to October 2017, 19 patients were diagnosed with PRES at Tampa General Hospital. Of those, 10 received at least 1 EEG. Four patients were male, 6 were female. The ages ranged from 21 to 87 (mean was 47). The patients had the following clinical presentations: 5 with encephalopathy, 8 with seizures, 2 with vision changes, and 3 with headache (some patients had more than 1 symptom). EEGs findings were as follows: 3 were normal; 3 showed intermittent generalized slowing; 2 showed continuous generalized slowing; 3 showed background slowing; 1 showed background suppression; 1 showed generalized rhythmic delta activity (GRDA); 1 showed GRDA, plus spike/sharp-wave discharges; 1 showed generalized periodic discharges. The etiologies were as follows: 9 from hypertension, 1 secondary to eclampsia, 3 due to posttransplant immunosuppression, and 1 patient was undergoing chemotherapy (some were multifactorial). Conclusion. EEG findings in PRES are diverse, with no specific or even predominant pattern, based on this small sample size.

中文翻译：

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后部可逆性脑病综合征的脑电图结果

介绍。后部可逆性脑病综合征 (PRES) 是医院环境中相对常见的脑病原因，脑电图结果尚未得到很好的描述。本研究的目的是回顾一系列 PRES 患者的脑电图结果。方法。我们回顾性地审查了我们的电子病历数据库，以识别 2016 年 1 月至 2017 年 10 月在坦帕综合医院接受 PRES 诊断的患者。 PRES 的诊断在临床表现中被怀疑并经磁共振成像证实。我们选择了至少接受过 1 次 EEG 的 PRES 患者。脑电图由 2 名获得委员会认证的脑电图医师解读。结果。2016 年 1 月至 2017 年 10 月，坦帕总医院有 19 名患者被诊断出患有 PRES。其中，10 人收到了至少 1 次脑电图。男性4例，女性6例。年龄从 21 岁到 87 岁不等（平均 47 岁）。患者有以下临床表现：脑病5例，癫痫8例，视力改变2例，头痛3例（部分患者有1种以上症状）。脑电图结果如下：3个正常；3 表现为间歇性全身性减慢；2 表现出持续的普遍放缓；3 显示背景变慢；1 显示背景抑制；1 表现出广义节律性 delta 活动 (GRDA)；1 显示 GRDA，加上尖峰/尖波放电；图1显示了广义的周期性放电。病因如下：高血压9例，子痫1例，移植后免疫抑制3例，化疗1例（部分多因素）。结论。PRES 的脑电图结果多种多样，