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EEG Value in Recurrent Stereotypical Events of Transient Neurological Dysfunction.

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Summary

Electroencephalogram (EEG) use for transient neurological dysfunction (TND) had low diagnostic yield. Inpatient EEGs rarely changed diagnoses or treatments for TND, suggesting limited utility in this patient group.

Keywords:
EEGinterictal epileptiform dischargestransient neurological dysfunction

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Area of Science:

  • Neurology
  • Clinical Neurophysiology

Background:

  • Electroencephalogram (EEG) is commonly used to evaluate transient neurological dysfunction (TND).
  • TND events can mimic epileptic seizures, complicating diagnosis.
  • The diagnostic value of EEG in TND requires further investigation.

Purpose of the Study:

  • To determine if EEG findings alter the diagnosis or treatment of TND.
  • To assess the impact of EEG on clinical management decisions for TND patients.

Main Methods:

  • Retrospective review of adult inpatient data from 2019-2021.
  • Analysis of standard and sleep-deprived EEG results for patients with TND.
  • Evaluation of changes in diagnosis and treatment based on EEG findings.

Main Results:

  • Of 145 TND patients, 4.1% showed interictal epileptiform discharges (IEDs).
  • 11.7% initiated antiseizure medications (ASMs), and 6.9% were diagnosed with epilepsy.
  • EEG led to diagnosis change in 0.7% and ASM initiation in 2.1% of patients.

Conclusions:

  • The diagnostic yield and treatment impact of inpatient EEG for TND are low.
  • Further research is needed on structured history's role in EEG utility for TND.
  • Current EEG use may not significantly alter TND diagnosis or management.