Long QT syndrome
Genetic mutations have been identified that increase a person's risk for SUDEP (some are discussed below), but ultimately their genetic risk is determined by the function of multiple genes that is not yet well understood. Overlap is seen between these ion channel genes and the different sudden death disorders, including SUDEP, SIDS, Sudden Unexpected Death (SUD), and Sudden Unexpected Death in Youth (SUDY). Many of the genes are involved in Long QT syndrome.