Source:Clinical Neurophysiology
Author(s): Sofia Backman, Erik Westhall, Irina Dragancea, Hans Friberg, Malin Rundgren, Susann Ullén, Tobias Cronberg
ObjectiveTo describe the electrophysiological characteristics and pathophysiological significance of electrographic status epilepticus (ESE) after cardiac arrest and specifically compare patients with unequivocal ESE to patients with rhythmic or periodic borderline patterns defined as possible ESE.MethodsRetrospective cohort study of consecutive patients treated with targeted temperature management and monitored with simplified continuous EEG. Patients with ESE were identified and electrographically characterised until 72 hours after ESE start using the standardised terminology of the American Clinical Neurophysiology Society.ResultsESE occurred in 41 of 127 patients and 22 fulfilled the criteria for unequivocal ESE, which typically appeared early and transiently. Three of the four survivors had unequivocal ESE, starting after rewarming from a continuous background. There were no differences between the groups of unequivocal ESE and possible ESE regarding outcome, neuron-specific enolase levels or prevalence of reported clinical convulsions.ConclusionESE is common after cardiac arrest. The distinction between unequivocal and possible ESE patterns was not reflected by differences in clinical features or survival.SignificanceA favourable outcome is seen infrequently in patients with ESE, regardless of using strict or liberal ESE definitions.
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