Cardiac arrest in a newborn: A case of pseudohypoaldosteronism.

Pseudohypoaldosteronism (PHA) is a rare disease that can cause life-threatening hyperkalemia, which could lead to cardiac arrest and death if not recognized and treated quickly. We report a case of a neonate who was diagnosed with PHA type 1 and found to have a novel variant gene mutation on the NR3C2 gene. A 5-day-old newborn presented in cardiac arrest with severe hyperkalemia, hyponatremia, and metabolic acidosis.