2013). In a series of 68 patients with epilepsy who were in good health but died unexpectedly of unknown cause (Sudden Unexpected Death in Epilepsy or SUDEP), postmortem DNA testing identified four individuals with nonsynonymous SCN5A variants previously identified to cause long QT‐syndrome (LQTS) in other individuals (Tu et al. 2011). This evidence concerns the gene SCN5A and familial long QT syndrome.