Scalp-EEG could record both ictal DC shift and HFO together even with time constant 2 sec
Scalp-EEG could record both ictal DC shift and HFO together even with time constant 2 sec
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即使时间常数为 2 秒，头皮脑电图也可以同时记录发作期 DC 偏移和 HFO
DOI：
10.1097/wnp.0000000000000670
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发表时间：
2020
影响因子：
2.4
通讯作者：
Akio Ikeda
中科院分区：
文献类型：
--
作者：
Tomohiko Murai;Takefumi Hitomi;Masao Matsuhashi;Riki Matsumoto;Yuki Kawamura;Masutaro Kanda;Ryosuke Takahashi;Akio Ikeda
在此，作者首次报道了一位77岁男性患者的头皮记录：(1)发作性直流电(DC)移位(在常规模式之前)和(2)发作期DC移位(被动DC移位；遵循常规和高频振荡发作模式)后的发作性高频振荡。用头皮EEG记录了16次临床SZS，持续时间为2秒。在记录到的16个Sz发作中，4个EEG Sz模式起源于左侧后颞区(慢性病灶)，所有模式(100%)均表现出比常规模式早12秒的DC活动移位。12个脑电Sz波起源于右侧顶区(急性病灶)，高频振荡(5个SZs)和直流电漂移(6个SZs)最先出现(41.6%)和DC移位(6个SZs)(50%)，其次是8s后出现常规模式。由于记录的主动和被动DC移位的时间常数均为2秒，小于先前报道的发作期DC移位的时间常数(例如，10秒的时间常数)，因此可以用2秒的时间常数来常规检查临床有用的发作期DC移位。
Herein, the authors report for the first time, scalp-recorded (1) focal ictal direct current (DC) shifts (active DC shifts; that precede conventional pattern) from the chronic focus of focal epilepsy and (2) ictal high-frequency oscillation after ictal DC shifts (passive DC shifts; that follow both conventional and high-frequency oscillation ictal patterns) from the acute focus of acute symptomatic seizures (Szs) in a 77-year-old man. Sixteen episodes of clinical Szs were recorded by scalp EEG with a 2-seconds time constant. Among the 16 recorded episodes of Sz, four EEG Sz patterns originated from the left posterior temporal area (chronic focus), and all patterns (100%) exhibited active DC shifts preceding the conventional pattern by 12 seconds. Twelve EEG Sz patterns originated from the right parietal area (acute focus), and the high-frequency oscillations (five Szs)(41.6%) and DC shifts (six Szs)(50%) occurred first, followed by the conventional pattern 8 seconds later. Because both the active and the passive DC shifts were recorded with a time constant of 2 seconds, which was smaller than that reported previously for ictal DC shifts (eg, time constant of 10 seconds), clinically useful ictal DC shifts could be routinely inspected with a time constant of 2 seconds.