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Pupillary Response as Assessment of Effective Seizure Induction by Electroconvulsive Therapy
Published on: April 11, 2019
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Electroconvulsive therapy electrode placement for bipolar state-related targeted engagement
Christopher C Abbott1, Jeremy Miller2, Megan Lloyd2
1Department of Psychiatry & Behavioral Sciences, University of New Mexico Health Sciences Center, University of New Mexico School of Medicine, Albuquerque, NM, 87131, USA. cabbott@salud.unm.edu.
International Journal of Bipolar Disorders
|May 5, 2019
Summary
Focal electrode placement in electroconvulsive therapy (ECT) offers equivalent efficacy to bitemporal placement for bipolar states, with fewer cognitive side effects. This approach optimizes treatment outcomes by targeting specific brain circuitry.
Area of Science:
- Neuroscience
- Psychiatry
- Medical Technology
Background:
- Electroconvulsive therapy (ECT) is effective for bipolar states but underutilized due to stigma and cognitive risks.
- Neuroimaging reveals state-specific brain activity in bipolar disorder, suggesting targets for brain stimulation.
- Electrode placement (non-focal bitemporal vs. focal unilateral/bifrontal) influences ECT outcomes.
Purpose of the Study:
- To review evidence on focal electrode placements in ECT for bipolar states.
- To assess if focal placements target specific aberrant circuitry to optimize clinical outcomes.
- To hypothesize that focal ECT provides equivalent efficacy to bitemporal ECT with reduced neurocognitive impairment.
Main Methods:
- Literature search of PubMed (2000-2018).
- Inclusion criteria: prospective, longitudinal studies during ECT series with specific electrode placements in bipolar states.
- Analysis of clinical and cognitive outcomes.
Main Results:
- Studies included bipolar mania (6), depression (6), mixed (3), and catatonia (1).
- Focal placements (right unilateral, bifrontal) showed reduced cognitive side effects.
- Focal placements demonstrated a faster rate of response and equivalent efficacy to non-focal (bitemporal) placement.
Conclusions:
- Focal electrode placements in ECT offer comparable efficacy to bitemporal placement for bipolar states.
- Focal ECT is associated with significantly reduced cognitive side effects and a faster response rate.
- Future research should focus on refined cognitive assessments and novel electrode configurations for targeted brain stimulation in bipolar disorder.
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