Electroconvulsive therapy as a contributor to the production of delusional misidentification.

Evidence for an organic component in patients with delusional misidentification syndromes is reviewed and three described who developed the Capgras symptom after a course of ECT which produced a mild organic psychosyndrome. The delusion was a complicating factor during treatment, but remitted in all cases as the organic brain syndrome cleared and the underlying condition improved.