Cardiac Rhythm Abnormalities in Patients With Refractory Epilepsy at High Risk for Sudden Death

People 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. This study plans to determine: 1. the frequency and types of cardiac arrhythmias that occur in this population and 2. whether these are increased above the general population in the same age group. Additionally, these data will be correlated to specific clinical data, including seizure history, anticonvulsant medications, and any accompanying clinical symptoms.