Recurrent apparent life-threatening events during infancy: a manifestation of inborn errors of metabolism.

To determine how often inborn errors of metabolism may cause unexplained apnea or recurrent apparent life-threatening events in infants, we retrospectively reviewed the records of 166 infants who were referred for apnea evaluation. A metabolic disorder was identified in 7 infants (4.2%), all of whom had recurrent apparent life-threatening events.