PMC5198796_01
EEG patterns during initial coma: (A) electrographic SE; (B) generalized periodic discharges.
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During rewarming, continuous electroencephalogram (EEG) recording revealed SE (Fig. 1A), and occasional brief 20-second episodes of left pectoral muscle contractions were observed. While electrographic seizures stopped three days after cardiac arrest, abundant GPDs persisted every few seconds (Fig. 1B).
EEG pattern of burst suppression on day 10.
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Despite an increased burst-suppression ratio up to 1:30 with 1-second bursts of moderate amplitude sharply contoured theta and delta slowing followed by 30 s of very low amplitude/voltage diffuse delta slowing, there were still runs of high amplitude GPDs (Fig. 2).
EEG pattern on day 72 showed improved, continuous, background and intermittent left frontotemporal spikes.
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The discontinuous background was several seconds of moderate amplitude slowing with occasional one-second bursts of diffuse low voltage activity (Fig. 3).
Changes in level of consciousness and alertness over the course of recovery.
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A graphic display to illustrates the improvement of cognitive status over time is depicted in Fig. 4.