Introduction:
Psychotherapy and pharmacotherapy have made great progress in the treatment of severe mental illness. At the same time it is becoming that even with optimal application not all patients respond adequately to these therapies. Electroconvulsive therapy (ECT) is especially used for depressive disorders, but also for schizophrenic psychoses as a complementary therapy method. 
Objectives:
A case report has shown a positive ECT influence on patient's treatment with negative symptoms and drug  resistance in schizoaffective disorder.

Methods:
67-year-old woman was acutely admittedto psychiatric ward. She has been received there because  schizoaffective disorder got worse. That was shown in the form of increasing tension, hyperventilation, trembling, rigidity, anxiety and impaired thinking. In treatment of drug resistance, ECT was applied as well known method of choice.

Results:
The following psychotropic drugs have been used in sufficient dosage and in sufficient time: benperidol, melperone, risperidone, paliperidone, olanzapine, clozapine, amisulpride, ziprasidone, mirtazapine, doxepin, benzodiazepines. However, they did not give satisfactory results in treatment of schizoaffective disorder. As a final treatment, ECT was used.
Conclusions:
67 years old patient with schizoaffective disorder has been received to psychiatric ward. Due to lack of response to pharmacotherapy treatment, electroconvulsive therapy was used. There were carried out, as required, a total of 8 treatments EKT- through bilateral stimulation starting with 20% to 80% of maximum stimulation energy over 3 weeks. Medicines Sertraline and Aripiprazole were given as complementary treatment. After the treatment there was a significant improvement in patient's mood and regression of delusional symptoms.

04 - ELECTROCONVULSIVE THERAPY (ECT) FOR TREATMENT RESISTANT SCHIZOAFFECTIVE DISORDER.