Abstract
The differentiation between generalized tonic-clonic seizure (GTCS) and syncope is an important clinical problem. Corroborative investigations, which are requested when history is unclear or insufficient, have limited diagnostic value. The aim of our study was to determine whether auditory event-related potentials (ERPs) can be utilized in post-event differentiation between GTCS and syncope. ERPs were recorded in 18 patients with a single seizure and in 21 patients following syncope, either on one or two occasions. ERP latencies and amplitudes were compared between groups and sessions. No significant differences of P3, N2, P2 and N1 latencies and P3, N2 and P2 amplitudes were found between patients following a single GTCS as compared to patients following syncope on either session. Post-event ERPs are insufficient to differentiate between GTCS and syncope. Further investigations are needed to evaluate the influence of different post-event intervals and ERP paradigms on ERP parameters in patients with GTCS.
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