Sudden cardiac arrest in a neonate with congenital adrenal hyperplasia.

We describe a 6-day-old male who developed cardiac arrest due to hyperkalemia secondary to congenital adrenal hyperplasia and was successfully resuscitated. This case illustrates the importance of considering congenital adrenal hyperplasia as one of the causes of sudden cardiac arrest in a neonate. A literature review revealed only one similar case in a 3-month-old with a fatal outcome.