ECT-Induced Myoclonus.

We report a case of electroconvulsive therapy (ECT)-induced myoclonus which occurred postictally following every treatment and was distinguished from continuing seizure activity by electroencephalogram (EEG) recordings. Subsequent treatment with amitriptyline resulted in an isolated episode of myoclonus that did not recur when the dosage of medication was increased. Besides the clinical implications, this sequence of events raises questions about the serotonin hypothesis of antidepressant-induced myoclonus.