Park KJ, et al. - Researchers examined potentially high-risk cardiac arrhythmias (PHAs) following focal to bilateral tonic–clonic seizures (FBTCSs) and generalized tonic–clonic seizures (GTCSs). Furthermore, they investigated the relationship of PHAs with seizure characteristics and the severity of associated ictal respiratory dysfunction. In the epilepsy monitoring unit (EMU), PHAs following a single FBTCS/GTCS were significantly correlated with the duration of ictal/postictal hypoxemia. It was possible that in a subset of susceptible patients dying of sudden unexpected death in epilepsy, FBTCS/GTCS-associated hypoxemia could trigger fatal cardiac arrhythmias.