<qa>  What is the risk for SUDEP particularly high for those with refractory epilePeople with epilepsy are at a higher risk for sudden unexpected death than the general population. Sudden unexpected death in epilepsy SUDEP is a major cause of death in this population, accounting for 10-50 of deaths for those with epilepsy. The risk for SUDEP is particularly high for those with refractory epilepsy. Several lines of evidence support a cardiac mechanism for SUDEP. 