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ECG abnormalities in patients with epilepsy
M J Keilson1, W A Hauser, J P Magrill
1Division of Neurology, Maimonides Medical Center, Brooklyn, NY 11219.
Insights
Patients with epilepsy are not at increased risk for sudden cardiac death. Ambulatory EEG/ECG monitoring found no significant cardiac arrhythmias associated with seizures in this patient group.
Area of Science:
- Neurology
- Cardiology
- Clinical Electrophysiology
Background:
- Epilepsy is a neurological disorder characterized by recurrent seizures.
- Sudden unexpected death in epilepsy (SUDEP) is a significant concern.
- Cardiac arrhythmias are hypothesized as a potential mechanism for SUDEP.
Purpose of the Study:
- To investigate the incidence of cardiac arrhythmias in patients with epilepsy.
- To determine if epilepsy patients exhibit a higher risk of potentially fatal arrhythmias.
Main Methods:
- Simultaneous ambulatory electroencephalography (EEG) and electrocardiography (ECG) monitoring were performed.
- 338 patients with epilepsy were included in the study.
- Cardiac arrhythmias and their association with electrographic seizures were analyzed.
Main Results:
- High-risk cardiac arrhythmias were detected in 5.3% of patients.
- No ventricular arrhythmias or conduction defects were observed during electrographic seizures.
- The majority of patients had low-risk arrhythmias or negative monitoring results.
Conclusions:
- The incidence of serious cardiac arrhythmias predisposing to sudden death is not elevated in patients with epilepsy.
- The study does not support the hypothesis that cardiac arrhythmias are a primary cause of sudden death in epilepsy.
- Further research may be needed to fully understand SUDEP mechanisms.
Abstract:
Some investigators believe that patients with epilepsy are at increased risk of sudden death, perhaps because of cardiac arrhythmias. We studied 338 patients with epilepsy referred for simultaneous ambulatory EEG/ECG monitoring. High-risk cardiac arrhythmias were detected in 18 (5.3%) patients while low-risk arrhythmias or negative studies were found in the others. Fifty-six electrographic seizures were seen in 17 patients, but no associated ventricular arrhythmias or conduction defects were identified. We conclude that the incidence of serious cardiac arrhythmias predisposing to sudden death is not increased in patients with epilepsy.