Iatrogenic seizures during intracranial EEG monitoring

Julie A. Khoury, Katherine H. Noe, Joseph F. Drazkowski, Joseph I. Sirven, Richard S. Zimmerman

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


Cerebral edema with declining neurologic status is a known complication of intracranial electroencephalography (EEG) monitoring. The frequency and consequences of iatrogenic edema that is not clinically evident are presently poorly defined. We investigated the potential for intracranial electrodes to cause subclinical cerebral edema, and for such edema to cause iatrogenic seizures. In a retrospective review of 33 adults who had head magnetic resonance imaging (MRI) while undergoing epilepsy surgery evaluation with intracranial EEG, 28% (6 of 21) depth electrode implantations had subclinical vasogenic edema. Of these, 50% (3 of 6) had nonhabitual electrographic seizures that appear to result from iatrogenic edema. No long-term adverse sequelae were noted, however, if unrecognized, iatrogenic seizures could lead to unnecessary exclusion from definitive surgical intervention for refractory epilepsy.

Original languageEnglish (US)
Pages (from-to)e123-e125
Issue number10
StatePublished - Oct 2011


  • Epilepsy
  • Intracranial electroencephalography
  • MRI
  • Seizures

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology


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