Determine the Incidence of Long QT Amongst a Large Cohort of Subjects Diagnosed With Unilateral or Bilateral Sensorineural Hearing Loss.

Inclusion Criteria: * All newborns who demonstrate a refer in one or both ears on a routine newborn hearing screen * Documentation of informed consent * Inborn * Ability to perform an ABR (auditory brainstem response screen technology) screening test * No major anomalies * Subjects' parents willing to provide follow-up data on their child Exclusion Criteria: * Newborns with a syndromic cause of hearing loss * Parents unwilling to provide follow-up data * Major congenital anomalies * Major medical problem or conditions. (i.e., hypoxic ischemic encephalopathy (HIE), persistent pulmonary hypertension neonate (PPHN), meconium aspiration, etc.) * Congenital cytomegalovirus (CMV)