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Effects of Labetalol on Hemodynamics and Seizure Duration During ECT

W. Vaughn McCall1, Frank E. Shelp, Richard D. Weiner

  • 1John Umstead Hospital, Butner, North Carolina, and Duke University Medical Center, Durham, North Carolina, USA.

Convulsive Therapy
|January 1, 1991
PubMed

Insights

Labetalol effectively reduces heart rate and rate pressure product during electroconvulsive therapy (ECT) in a dose-dependent manner. However, it did not significantly impact blood pressure or seizure duration in this study.

Area of Science:

  • Anesthesiology
  • Cardiology
  • Neurology

Background:

  • Beta blockers are frequently administered to manage heart rate and blood pressure surges during electroconvulsive therapy (ECT).
  • Concerns exist regarding potential anticonvulsant effects of some beta blockers, which might interfere with ECT efficacy.
  • Labetalol, a combined alpha and beta blocker, is commonly used in this context.

Purpose of the Study:

  • To investigate the dose-response relationship of intravenous labetalol on hemodynamic responses and seizure duration during ECT.
  • To evaluate the potential countertherapeutic effects of labetalol in ECT.

Main Methods:

  • A randomized, double-blind, placebo-controlled study was conducted.
  • Participants received varying doses of intravenous labetalol (5 mg, 10 mg) or placebo prior to ECT.
  • Hemodynamic parameters (heart rate, blood pressure, rate pressure product) and seizure duration were monitored.

Main Results:

  • Labetalol demonstrated a dose-dependent reduction in heart rate and rate pressure product at 5 mg and 10 mg compared to placebo.
  • No significant differences in blood pressure or seizure duration were observed between labetalol groups and the placebo group.
  • The 5 mg and 10 mg doses of labetalol did not show significant differences in their effects on the measured parameters.

Conclusions:

  • Intravenous labetalol effectively attenuates heart rate and rate pressure product during ECT in a dose-dependent manner.
  • Labetalol does not appear to significantly affect blood pressure or seizure duration in the tested dosage range.
  • These findings suggest labetalol can be safely used for hemodynamic management during ECT without compromising seizure efficacy.

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