[Interventional psychiatric procedures and novel substances for the treatment of affective disorders: An overview and outlook].

Depression is one of the most common mental disorders. The effectiveness of pharmacological and psychotherapeutic treatments is well documented. Remission rates are around 67 % for pharmacological antidepressant initial and secondary treatment of a depressive episode in unipolar disorders. However, patients with a depressive episode who do not respond to at least two successive attempts at pharmacological antidepressant treatment have significantly lower remission rates. Particularly in this subgroup with difficult-to-treat depression, brain stimulation procedures and treatment with novel substances represent innovative and effective treatment options that complement pharmacotherapy and psychotherapy. The aim of this paper is to provide an overview and outlook on the following treatment procedures: repetitive transcranial magnetic stimulation (rTMS), electroconvulsive therapy (ECT), ketamine/esketamine, transcranial direct current stimulation (tDCS), deep brain stimulation (DBS), and psychedelic-assisted psychotherapy (PAT). An outlook on selected current developments with the aim of a procedure-specific, individualized indication will be given.