Digital video EEG monitoring has a very efficient diagnostic recording system that is much less time consuming for data retrieval and analysis, allowing for proper data reduction, online EEG processing for automated seizure and epileptiform discharge acquisition, and offline epilepsy analysis without the need for paper storage. EEG changes are recorded on computer disk so that the stored portion can be put back on paper for immediate analysis. Digital video EEG monitoring also allows for clip resynthesis, quantitative EEG analysis, and data filtering. Video EEG monitoring includes both short- and long-range monitoring and has been used primarily for the diagnosis of epilepsy classification (e.g., epileptic versus non-epileptic disorders) and the evaluation of surgical indications in patients with refractory partial-onset epilepsy. The role is very important in determining the location of epileptic foci (e.g., determining seizure location and propagation of primitive epileptic foci). Some studies have confirmed that video EEG monitoring has a very high rate of correct diagnosis in both seizure and non-seizure periods.