What is the role of ictal electroencephalogram in the workup of infantile spasm (West syndrome)?

Updated: Jan 11, 2019
  • Author: Tracy A Glauser, MD; Chief Editor: Stephen L Nelson, Jr, MD, PhD, FAACPDM, FAAN, FAAP  more...
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Eleven different types of ictal patterns have been identified in patients with infantile spasms. In one study, the most common pattern, found in 38% of patients with seizures, was a high-voltage, frontal dominant, generalized slow-wave transient followed by voltage attenuation, also termed an electrodecremental episode. These electrodecremental episodes were a feature in 71% of the seizures.No close correlation exists between the type of seizure and the EEG pattern.

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