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Updated: May 10, 2026
04:51
Pupillary Response as Assessment of Effective Seizure Induction by Electroconvulsive Therapy
Published on: April 11, 2019
Heart rate changes during electroconvulsive therapy
1Christophsbad Clinic, Göppingen 73035, Germany. JosefNagler@gmx.de.
Annals of General Psychiatry
|June 15, 2013
Summary
Electrode placement during electroconvulsive therapy (ECT) affects initial heart rate changes, but not peak heart rate. The study suggests baroreceptor reflexes mediate heart rate decline post-seizure.
Area of Science:
- Cardiology
- Neurology
- Psychiatry
Background:
- Observational study on heart rate during electrically induced seizures.
- Investigated factors influencing heart rate response to electroconvulsive therapy (ECT).
Purpose of the Study:
- Evaluate effects of electrode placement, patient age, and stimulus dose on heart rate during ECT.
- Identify predictors of heart rate changes during and after seizures.
Main Methods:
- Monitored heart rate beat-to-beat in 119 patients undergoing right unilateral (RUL) or bifrontal (BF) ECT.
- Plotted heart rate graphs up to 130 seconds post-stimulation.
Main Results:
- RUL stimulation showed an initial heart rate drop (12.5 ± 2.6 s) influenced by train duration, age, and baseline heart rate.
- BF stimulation exhibited a rapid sympathetic response (median 3.5 s).
- Peak heart rate (135 ± 20 bpm) depended on baseline rate and seizure duration; electrode placement, dose, and age were not significant predictors.
Conclusions:
- Electrode placement significantly impacts only the initial cardiac response.
- Electrical stimulation, not the seizure itself, likely causes initial heart rate increase in BF ECT.
- Baroreceptor reflex may mediate the significant heart rate decline observed at seizure cessation.
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