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Does higher cardiovascular response to ECT predict early antidepressant effect?

E S M Saravanan1, B N Gangadhar, N Janakiramaiah

  • 1Department of Psychiatry, National Institute of Mental Health and Neurosciences, Bangalore, 560 India.

Journal of Affective Disorders
|July 10, 2002
PubMed
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Cardiovascular response, specifically rate pressure product (RPP), during electroconvulsive therapy (ECT) without atropine may predict antidepressant effects in major depressive disorder patients. Higher RPP indicates a better short-term therapeutic response.

Area of Science:

  • Neuroscience
  • Psychiatry
  • Cardiology

Background:

  • Diencephalic seizure generalization during electroconvulsive therapy (ECT) influences cardiovascular response and may correlate with therapeutic potency.
  • Previous studies suggest a trend for greater rate pressure product (RPP) response in ECT responders versus non-responders.
  • Atropine, used in modified ECT, is known to increase RPP, potentially confounding its predictive value.

Purpose of the Study:

  • To investigate whether cardiovascular response during ECT, with or without atropine, can predict antidepressant effects.
  • To explore the relationship between RPP and early antidepressant response in patients with major depressive disorder.

Main Methods:

  • Twenty-nine patients with major depressive disorder underwent ECT.

Related Experiment Videos

  • Atropine premedication was randomly withheld during either the second or third ECT session for each patient.
  • RPP was continuously monitored during ECT, and depression severity was assessed twice weekly.

    • Main Results:

    • Fifteen patients achieved remission within two weeks.
    • Early remitters exhibited significantly higher poststimulus RPP during ECT sessions without atropine compared to non-remitters.
    • This association between RPP and remission was not observed in sessions with atropine.
    • Cumulative poststimulus RPP was a significant predictor of early antidepressant response, unlike seizure duration.

    Conclusions:

    • RPP response during ECT, particularly under a no-atropine condition, may serve as a physiological indicator of therapeutic effects and seizure adequacy.
    • The study highlights the potential of cardiovascular monitoring as a biomarker for ECT efficacy.
    • Further research is needed, considering limitations such as uncontrolled stimulus laterality and focus on short-term effects.