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Related Experiment Video

Updated: May 19, 2026

Vagus Nerve Stimulation As an Adjunctive Neurostimulation Tool in Treatment-resistant Depression

Vagus Nerve Stimulation As an Adjunctive Neurostimulation Tool in Treatment-resistant Depression

Published on: January 7, 2019

ECT use in unipolar and bipolar depression.

Smita Agarkar¹, Stephen Hurt, Sarah Lisanby

¹Department of Psychiatry, Weill Cornell Medical College, New York, NY, USA. smd9004@med.cornell.edu

The Journal of ECT

|August 24, 2012

Summary

Patients with bipolar depression may require fewer electroconvulsive therapy (ECT) treatments than those with unipolar depression to achieve similar benefits. This study compared ECT response in both patient groups.

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Vagus Nerve Stimulation As an Adjunctive Neurostimulation Tool in Treatment-resistant Depression

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Closed-Loop Neurostimulation for Biomarker-Driven, Personalized Treatment of Major Depressive Disorder

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Area of Science:

Neuroscience
Psychiatry
Clinical Medicine

Background:

Limited research exists comparing electroconvulsive therapy (ECT) response in unipolar versus bipolar depression.
Understanding differential treatment needs is crucial for optimizing patient care.

Purpose of the Study:

To compare the effectiveness and treatment course of right unilateral ECT in inpatients with unipolar and bipolar depression.
To identify potential differences in the number of ECT sessions needed for therapeutic benefit.

Main Methods:

Retrospective chart review of inpatients diagnosed with unipolar or bipolar depression.
Analysis of demographics, number of ECT treatments, Global Assessment of Functioning (GAF) scores, and length of hospital stay.
Comparison of treatment outcomes between the unipolar and bipolar depression cohorts.

Main Results:

Changes in Global Assessment of Functioning (GAF) scores and length of hospital stay were comparable between groups.
Patients with bipolar disorder received significantly fewer ECT treatments (mean 7.5 ± 1.6) compared to those with unipolar disorder (mean 10.2 ± 1.9).

Conclusions:

Fewer electroconvulsive therapy (ECT) treatments may be necessary to achieve comparable clinical improvement in bipolar depression versus unipolar depression.
These findings suggest a potential for more efficient treatment protocols in bipolar depression using ECT.