Abstract
Continuous EEG monitoring (cEEG) is increasingly employed to detect nonconvulsive seizures (NCSz) and nonconvulsive status epilepticus (NCSE) in critically ill patients. A recent international survey of 338 neurologists found that 83% use cEEG at least monthly.1 The growth in cEEG utilization has led to an increase in the recognition of EEG patterns of uncertain diagnostic and prognostic implications. Generalized periodic discharges (GPDs), formerly referred to as generalized periodic epileptiform discharges (GPEDs), represent one such pattern. GPDs are defined as the repetition of frontal- or occipital-dominant, synchronous, relatively symmetric discharges.2 They have relatively uniform morphology and duration with a definable and quantifiable interval between consecutive waveforms, with recurrence …
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