Sudden Infant Death Syndrome
Sudden infant death syndrome (SIDS) is the third leading cause of infant mortality in the United States. SIDS is defined as the sudden death of an infant younger than age 1 year that cannot be explained after a thorough investigation, including autopsy, scene investigation, and clinical history. Despite research and advances in understanding of SIDS, it remains a diagnosis of exclusion after ruling out accidental causes such as suffocation/strangulation and cardiac, infectious, metabolic, or traumatic etiologies. Although the exact pathogenesis is unknown, a working model of SIDS includes a combination of exogenous factors, such as overbundling, prone sleep position, and airway obstruction, and intrinsic factors such as immature cardiorespiratory or arousal systems.