Factors Predicting Ictal Quality in Bilateral Electroconvulsive Therapy Sessions

Area of Science:

• Neuroscience
• Psychiatry
• Medical Technology

Background:

• Ictal characteristics in electroconvulsive therapy (ECT) correlate with treatment efficacy.
• Understanding procedural variables influencing seizure parameters is crucial for optimizing ECT.

Purpose of the Study:

• To investigate the impact of electroconvulsive therapy (ECT) procedure-related variables on seizure outcomes.
• To identify modifiable factors that can optimize seizure quality and postictal suppression.

Main Methods:

• Analysis of 250 bilateral ECT sessions from 47 subjects.
• Evaluation of seizure results using seizure quality index (SQI), seizure adequacy markers sum (SAMS), and postictal suppression.
• Application of repeated measurement regression analyses to identify predictors of seizure outcomes.

Main Results:

• Days between sessions, higher oxygen saturation, and protocolized hyperventilation predicted better seizure quality (SQI and SAMS).
• Lower ASA classification, benzodiazepine use, and lithium doses influenced SQI and SAMS scores.
• Higher muscle relaxant doses and lower stimulus intensities affected postictal suppression.

Conclusions:

• Several modifiable procedural factors in ECT significantly impact seizure characteristics.
• Adjusting variables such as hyperventilation, oxygen saturation, and medication management can optimize ECT session results.