What is the role of EEG 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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Always perform an EEG in patients with suspected infantile spasms, since the diagnosis depends on the presence of specific EEG findings. [12]

If possible, obtain prolonged video-EEG telemetry to record waking and sleeping EEG to assist in confirming a suspected diagnosis. A routine 20-minute EEG may not capture the patient while both awake and asleep and thus may miss specific important EEG findings. If there are no interictal abnormalities, prolonged video-EEG to catch the events of concern would also assist in differentiating them from other movements such as benign myoclonus of infancy.

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