Accelerated Intermittent Theta-Burst Stimulation (aiTBS) in Treatment-Resistant Depression of Bipolar II Disorder

The aim of this study is to assess the efficacy of aiTBS applied to the left dorsolateral prefrontal cortex (L-DLPFC) in reducing depressive symptoms in individuals with bipolar II disorder, and to determine the neural functional connectivity changes that underlie treatment response. A total of 60 individuals with bipolar II disorder who are currently experiencing a depressive episode will be recruited for the study. The accelerated iTBS (aiTBS) treatment will consist of 10 sessions, administered daily over a period of 5 consecutive days. Before and after the stimulation, magnetic resonance imaging (MRI) scans, electroencephalograms (EEG), and heart rate variability (HRV) will be collected. The severity of depressive symptoms will be evaluated using both clinician-rated and self-report assessments.