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These authors conducted a prospective study to determine the incidence of and risk factors for “epileptic activity” in 100 consecutive patients with acute stroke (91 ischemic, 9 hemorrhagic). During treatment in a stroke unit, the patients underwent continuous EEG (cEEG) monitoring for an average of 17.5 hours, using 10 electrodes with an 8-channel subset of the International 10-20 system. The authors considered as epileptic activity repetitive sharp waves or spikes, periodic lateralized epileptic discharges, or electrographic seizures. Patients with nonclinical epileptic activity were not treated systematically.
Epileptic activity was present in 17 of the 100 patients. Three patients had clinical seizures at stroke onset; an additional two …