Brief vs. ultrabrief pulse ECT: focus on seizure quality

Area of Science:

• Neuroscience
• Psychiatry
• Medical Technology

Background:

• Electrocovulsive therapy (ECT) is a treatment for severe mental health conditions.
• Previous studies suggest ultrabrief pulse (UBP) ECT is less effective than brief pulse (BP) ECT.
• Seizure quality is historically linked to ECT's clinical outcomes.

Purpose of the Study:

• To investigate the efficacy of UBP versus BP ECT using a novel seizure quality-based dosing strategy (CASBAS).
• To determine if CASBAS could maintain seizure quality and clinical outcomes across different pulse widths.
• To test if increased stimulus intensity could compensate for UBP's potentially lower efficacy.

Main Methods:

• Retrospective analysis of 245 patients undergoing ECT, with 162 receiving BP and 83 receiving UBP.
• Implementation of the Clinical and Seizure Based Stimulation (CASBAS) dosing strategy, adjusting intensity based on seizure quality and clinical status.
• Comparison of seizure quality, clinical outcomes (in a subgroup), and stimulus intensity between BP and UBP groups.

Main Results:

• Seizure quality and clinical outcomes did not significantly differ between BP and UBP groups for most parameters.
• Stimulus intensity was significantly higher in the UBP group compared to the BP group.
• UBP was found to be less efficient than BP in achieving comparable ictal quality and clinical outcomes.

Conclusions:

• The CASBAS dosing strategy demonstrated suitability for adjusting stimulus intensity and maintaining seizure quality in ECT.
• Despite the CASBAS strategy, UBP ECT showed reduced efficacy compared to BP ECT.
• Further research is needed to optimize UBP parameters or confirm the superiority of BP ECT.