[Electroconvulsive therapy as maintenance therapy and for prevention of recurrence in psychiatric disorders and Parkinson disease].

Electroconvulsive therapy is a reliable and safe option for patients with psychiatric disorders who are resistant or intolerant to medication as these patients usually respond quickly to this form of treatment. For clinicians, the management of these often severely ill patients is an important challenge given the high rate of relapse of these disorders. Maintenance electroconvulsive therapy is an interesting treatment option for these patients. Until now, only few controlled studies exist about the long-term outcome of this treatment in depressive disorders and other psychiatric disorders. Altogether, this form of outpatient prophylactic therapy has been found to be safe, well tolerated, and efficacious in relapse prevention. Moreover, it has been found to reduce hospitalization rates. Particularly in the elderly, and in patients who have been shown to be refractory to medication regimens, maintenance electroconvulsive therapy should be seriously considered as a means to reduce the risk of recurrence of illness. In Parkinson's disease maintenance electroconvulsive therapy is not widely established although its usefulness has been documented in numerous studies. First-line evidence data on incidence, dimensions and outcome of cognitive side effects under maintenance electroconvulsive therapy is still warranted.