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Electroconvulsive Seizures in Rats and Fractionation of Their Hippocampi to Examine Seizure-induced Changes in Postsynaptic Density Proteins
Published on: August 15, 2017
Seizure duration and related issues in ect for endogenous depression
1Assistant Professor, Department of Psychophemenogy, NIMHANS, Bangalore - 560 029.
Indian Journal of Psychiatry
|July 22, 2011
Summary
Electroconvulsive therapy (ECT) seizure duration may be a therapeutic indicator for depression. A cuff seizure duration exceeding 20 seconds might be sufficient for antidepressant effects, though ECT
Area of Science:
- Neuroscience
- Psychiatry
- Clinical Medicine
Background:
- Electroconvulsive therapy (ECT) is a treatment for severe depression.
- The relationship between seizure duration during ECT and treatment efficacy is not fully understood.
- Comparing different ECT waveforms (sinusoidal vs. brief-pulse) is crucial for optimizing treatment.
Purpose of the Study:
- To investigate the correlation between seizure duration and ECT treatment outcomes in patients with endogenous depression.
- To compare seizure characteristics between sinusoidal wave and brief-pulse ECT.
- To evaluate the anticonvulsant hypothesis of ECT's antidepressant effects.
Main Methods:
- Monitoring seizure duration using the cuff method in 29 patients undergoing 180 ECT sessions.
- Comparing sinusoidal wave and brief-pulse ECT.
- Utilizing regression analysis to identify predictors of seizure duration and correlating duration with treatment response.
Main Results:
- Mean seizure duration was 26.5 seconds; individual patient means ranged from 15.7 to 38.5 seconds.
- A cuff seizure duration exceeding 20 seconds appeared sufficient for therapeutic effect in good responders.
- Seizure threshold increased with successive ECTs in brief-pulse ECT, but did not differ between responders and non-responders.
Conclusions:
- Seizure duration, particularly exceeding 20 seconds, may be a key factor in ECT's antidepressant efficacy.
- Findings offer limited support for the anticonvulsant hypothesis of ECT's antidepressant action.
- ECT consistently demonstrates an anticonvulsant effect, supporting existing literature.
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