Fig. 2
From: Prognostication after cardiac arrest: how EEG and evoked potentials may improve the challenge
EEG longitudinal montages showing typical malignant patterns (adapted from Westhall et al. [58] and ACNS terminology [32]). A Electroencephalographic seizure with high frequency (> 2.5 Hz) generalized spikes, more broadly defined as pattern with epileptiform discharges > 2.5 Hz for ≥ 10 s or any pattern with definite spatial and temporal evolution lasting ≥ 10 s. B Generalized periodic pattern (i.e., epileptiform features) defined as non-evolving and low frequency (<2.5 Hz) periodic discharges (spike, sharp or wave) during > 50% of the recording, without suppressed background. C Discontinuous background defined as suppression periods (< 10 µV) constituting > 10% but < 49% of the recording. D Low voltage background defined as amplitude of the background < 20 µV. Unreactive EEG is not illustrated here