A newborn is being monitored in the neonatal intensive care unit due to a prenatal diagnosis of tetralogy of Fallot.

A newborn is being monitored in the neonatal intensive care unit due to a prenatal diagnosis of tetralogy of Fallot.

On day 5 after birth, the baby develops generalized seizures.

Treatment for the seizures is provided. 

Laboratory results are shown:

• Calcium  5 mg/dL (1.25 mmol/L) (reference range, 8.8-10.7 mg/dL)
• Magnesium ...