Which abnormalities on the electroencephalogram (EEG) increase the risk of recurrent epileptic seizures?

Updated: May 30, 2019
  • Author: David Y Ko, MD; Chief Editor: Selim R Benbadis, MD  more...
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Abnormalities on an EEG may include any of the following:

  • Epileptiform discharges

  • Focal slowing

  • Diffuse background slowing

  • Intermittent diffuse intermixed slowing

Epileptiform abnormalities and focal slowing are the EEG findings associated with the highest risk of seizure recurrence. Nevertheless, even a normal EEG does not eliminate recurrence risk.

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