Abstract
Epileptic spasms (ES) are the ictal manifestation of West syndrome. Due to poor interrater reliability in diagnosing hypsarrhythmia, identification of ES - ideally on video EEG monitoring - is important to start proper treatment. We retrospectively analyzed inpatient video EEG recordings of 42 patients with new onset ES and calculated the time needed to capture the first ES, along with time to first sleep epoch, among other data. The average time to capture ES was 188.36min with a 95 percent confidence interval from 116.95 to 259.76min. The average onset of sleep occurred at 30.8min with 95% Confidence interval between 19.9 and 41.9min. There was no significant correlation between duration of symptoms and etiology and the time needed to detect first spasm on EEG. Routine or short duration EEGs are not sufficient to capture ES in most patients. 4-5-hour VEEG monitoring duration should be considered to capture ictal data in patients suspected of having ES.
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