The Value of Ictal and Interictal Video-EEG Monitoring for Patients with Epilepsy

Objective To investigate the value of abnormalities in ictal and interictal video-EEG monitoring for diagnosis,differential diagnosis and localization of epileptic foci in patients with epilepsy.Methods Using American Bio-logic video EEG monitoring system,73 cases of patients diagnosed with epilepsy were monitored by video-EEG.All cases were performed hyperventilation,opening and closing eyes and flash-induced stimulation test.The situation of seizure(systemic and local) and the integrated and clearly changes of EEG in sleep-awakening cycle(24h) were recorded by dual video monitor.Results All cases had clinical seizure during V-EEG monitoring(1 or more times).37 cases(50.7%) were observed onset only during sleeping,while 17 cases(23.3%) were found onset only during lucid interval and 18 cases(24.7%) were recorded onset both during sleeping and waken.1 case onset showed normal EEG(eventually diagnosed as hysteria);72(98.6%) cases with abnormally ictal EEG changes.30(41.7%)cases had a clear starting position in ictal EEG.39 cases(54.9%) were recorded interictal spike wave EEG.The coincidence of abnormal distribution in ictal and interictal EEG was 53.3%(16/30).Interictal EEG were dominated with spike-slow waves and ictal EEG were dominated with dynamic changes.Conclusion The performance of epilepsia EEG is diversified.The clinical seizure onset dominated with the dynamic changes which suddenly distinguished from background rhythmicity and amplitude.The start of localizated abnormal EEG prompt the epileptogenic zone of paradoxical discharge.It can help to classified epilepsy,location of epileptogenic zone,and to provide the significant value of surgical treatment for epilepsy and to guide clinical medication.