<unk>  (SUDC) is the<unk>  of a child over the age of 12 months which remains<unk>  after a thorough investigation and autopsy. There has not been enough research to identify risk factors, common characteristics, or prevention strategies for SUDC. SUDC is similar in concept to<unk>  infant<unk>  syndrome (SIDS). Like SIDS, SUDC is a diagnosis of exclusion, the concrete symptom of both being<unk> . However, SIDS is a diagnosis specifically for infants under the age of 12 months while SUDC is a diagnosis for children 12 months and older. The causes of SIDS and SUDC are not definitively known but there are good chances heart arrhythmias and seizures are the main causes. Although it can happen to any child under the age of 18 (after which the<unk> s are classified as<unk>  arrhythmic<unk>  syndrome (SADS), it is most common in those aged between 1-4 years.
Sudden unexplained death in childhood
Cardiac myxoma
Familial atrial fibrillation
Hypertension and brachydactyly syndrome
Aicardi syndrome
Neonatal-onset multisystem inflammatory disease
Epilepsy in children
Arts syndrome