ArticleThe journal of ECT2022
Ictal Theta Power as an Electroconvulsive Therapy Safety Biomarker: A Pilot Study.
Article in The journal of ECT, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 12 citations in OpenAlex.
- Electroconvulsive therapy generates a postictal wave of spreading depolarization in mice and humans.Nature communications · 2025Article
- How electroconvulsive therapy works in the treatment of depression: is it the seizure, the electricity, or both?Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2024Review
- Electric Field, Ictal Theta Power, and Clinical Outcomes in Electroconvulsive Therapy.Biological psychiatry. Cognitive neuroscience and neuroimaging · 2023Article
- Cerebro-cerebellar functional neuroplasticity mediates the effect of electric field on electroconvulsive therapy outcomes.Translational psychiatry · 2023Article
- Neural activity changes in first-episode, drug-naïve patients with major depressive disorder after transcutaneous auricular vagus nerve stimulation treatment: A resting-state fMRI study.Frontiers in neuroscience · 2022Article
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Authors and funding
8 authors at 4 institutions in 1 country.
Funding
Abstract
objectiveElectroconvulsive therapy (ECT) remains the benchmark for treatment resistant depression, yet its cognitive adverse effects have a negative impact on treatment. A predictive safety biomarker early in ECT treatment is needed to identify patients at cognitive risk to maximize therapeutic outcomes and minimize adverse effects. We used ictal electroencephalography frequency analysis from suprathreshold treatments to assess the relationships between ECT dose, ictal power across different frequency domains, and cognitive outcomes.
methodsSeventeen subjects with treatment resistant depression received right unilateral ECT. Structural magnetic resonance imaging was obtained pre-ECT for electric field modeling to assess ECT dose. Serial assessments with 24-lead electroencephalography captured ictal activity. Clinical and cognitive assessments were performed before and after ECT. The primary cognitive outcome was the change in Delis Kaplan Executive Function Verbal Fluency Letter Fluency.
resultsIctal theta (4-8 Hz) power in the Fp1/Fp2 channels was associated with both whole-brain electric field strength (t(2,12) = 19.5, P = 0.007)/(t(2,10) = 21.85, P = 0.02) and Delis Kaplan Executive Function Verbal Fluency Letter Fluency scores (t(2,12) = -2.05, P = 0.05)/(t(2,10) = -2.20, P = 0.01). Other frequency bands (beta, alpha, delta, and gamma) did not demonstrate this relationship.
conclusionsThis pilot data identify ictal theta power as a potential safety biomarker in ECT and is related to the strength of the ECT dose. Ictal theta power could prove to be a convenient and powerful tool for clinicians to identify those patients most susceptible to cognitive impairment early in the treatment series. Additional studies are needed to assess the role of longitudinal changes in ictal theta power throughout the ECT series.
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