Pretreatment interhemispheric EEG coherence is related to seizure duration in right unilateral electroconvulsive therapy.

Objective: The relationships between pretreatment EEG parameters and seizure duration in electroconvulsive therapy (ECT) were studied in order to provide information useful for the prediction of ECT-induced seizures.

Methods: In 16 depressed patients treated with right unilateral ECT, pretreatment absolute band powers and interhemispheric coherences were assessed and correlated with the duration of the first ECT-induced seizure.

Results: Interhemispheric coherence for the central electrodes in the fast alpha band was positively correlated with seizure duration.