A treatment-emergent affective switch (TEAS) into mania.

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Presentation transcript:

A treatment-emergent affective switch (TEAS) into mania. A treatment-emergent affective switch (TEAS) into mania. A TEAS can culminate in either mania/hypomania or depression. The figure shows a switch from euthymia or a depressed state into a state of hypomania/mania (note the duration and number of manic symptoms may not satisfy criteria for an episode of hypomania/mania—and it may be that the switch is marked solely by a few symptoms of mania lasting a relatively short period of time). The diagram also shows the key components of the process that leads to the development of TEAS beginning with a significant change to treatment some time prior to the emergence of mood symptoms. This period of time, called the Treatment-Emergence (TE) interval, is typically of 8–12 weeks duration according to an International Society for Bipolar Disorders (ISBD) taskforce. However, in practice much shorter intervals are common. The direction of the switch, the amplitude of the change and its overall duration define TEAS. The latter can be subdivided into three components: emergence, elevation and resolution. Adopting a more sophisticated approach to defining TEAS should facilitate a clearer and deeper understanding of this phenomenon to emerge. (Adapted from Malhi et al;10 original diagram developed with assistance from Danielle Gessler). Gin S Malhi Evid Based Mental Health 2015;18:100-102 Copyright © by the BMJ Publishing Group Ltd, Royal College of Psychiatrists & British Psychological Society. All rights reserved.