What are the mortality rates 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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The premature death rate for infantile spasm ranges from 5-31%. The upper limit comes from a study of 214 Finnish children with a history of infantile spasms who were followed for a mean period of 25 years (range, 20-30 y). Most of the deaths (61%) occurred at or before age 10 years, while only 10% occurred after age 20 years.

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