Fig. 1

aEEG background patterns (C: Continuous, DC: Discontinuous, BS: Burst Suppression, LV: Low Voltage, FT: Flat Trace). Definitions according to Hellström-Westas et al. [22]. According to Schettler, for LV the lower margin is around or below 5 μV and the upper margin is no more than 10 μV [3]. The assignment of an aEEG section to an aEEG pattern is based on the upper and lower margins of the aEEG. The visual determination of the position of the upper or lower margin for an aEEG section can be carried out in such a way that 50% of the associated values are above and 50% below [26]