Bilateral independent periodic discharges are associated with electrographic seizures and poor outcome: a case-control study

Bilateral independent periodic discharges (BIPDs; previously known as bilateral independent periodic lateralized epileptiform discharges or BIPLEDs) are EEG abnormalities consisting of discharges that occur repeatedly with a quantifiable and nearly regular inter-discharge interval, and independently (asynchronously) over each hemisphere. (Hirsch et al. 2013) The prevalence and clinical and prognostic significance of BIPDs in patients undergoing continuous EEG monitoring (CEEG) remains unclear. One study previously showed prevalence of 0.1% in unselected sets of inpatient and outpatient EEGs (Chatrian et al.

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