KCNH2 and Sudden unexpected death in epilepsy: Mutations and SNPs in KCNH2 have also been linked with epilepsy and SUDEP, and retrospective studies have found that a history of seizures was more common among LQT2 patients compared to the other LQT subtypes [97], and further reinforces an important contribution of KCNH2 defects to epilepsy predisposition.