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Electroconvulsive Therapy01:30

Electroconvulsive Therapy

Electroconvulsive therapy (ECT), or shock therapy, remains a critical biomedical intervention for severe, treatment-resistant depression. While its origins can be traced back to Hippocrates' observations that malaria-induced convulsions alleviated mental illness, modern ECT has evolved significantly from its earlier, more primitive applications. First introduced in 1938 by Ugo Cerletti and his colleagues, ECT involves inducing controlled seizures using electrical currents. In its early years,...

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Pupillary Response as Assessment of Effective Seizure Induction by Electroconvulsive Therapy
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Early effects of electroconvulsive therapy on cognitive function.

Richard Porter1, Helen Heenan, Jo Reeves

  • 1Department of Psychological Medicine, University of Otago, Christchurch, New Zealand. richard.porter@chmeds.ac.nz

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|April 2, 2008
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Summary

Early cognitive screening during electroconvulsive therapy (ECT) is feasible. Memory function changes after 3 ECT treatments, but these early changes do not predict long-term cognitive outcomes.

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Area of Science:

  • Neuroscience
  • Psychiatry
  • Cognitive Psychology

Background:

  • Routine cognitive function screening is recommended during electroconvulsive therapy (ECT).
  • Limited evidence exists on practical, early-changing, and predictive cognitive measures in ECT.
  • Investigating early cognitive changes is crucial for managing ECT-related side effects.

Purpose of the Study:

  • To assess the practicality of early formal cognitive screening in routine ECT clinical practice.
  • To identify cognitive measures that change early in the course of ECT treatment.
  • To explore the correlation between early cognitive changes and longer-term cognitive outcomes.

Main Methods:

  • Thirty-three patients (aged 25-84) underwent cognitive assessments at baseline, after 3 ECT treatments, and 2 months post-treatment.
  • Cognitive tests included Rey Verbal Learning Test (RAVLT), Autobiographical Memory Interview (Short Form), Digit Span (Forwards/Backwards), and Modified Mini-Mental State Examination (3MSE).
  • Analysis focused on changes after 3 treatments and their correlation with 2-month follow-up changes.

Main Results:

  • Significant reductions in immediate and delayed recall on the RAVLT were observed after 3 ECT treatments.
  • Autobiographical memory scores also significantly decreased, while Digit Span and 3MSE showed no significant changes.
  • No correlation was found between early (3-treatment) memory score reductions and 2-month follow-up reductions.

Conclusions:

  • Significant memory function changes can be detected early in ECT treatment (after 3 sessions).
  • Early cognitive monitoring is practical within routine clinical ECT settings.
  • Early detected memory changes did not correlate with longer-term cognitive alterations post-ECT.