Once vs. three times weekly ECT in melancholia: a randomized controlled trial

Area of Science:

• Neuroscience
• Psychiatry
• Clinical Therapeutics

Background:

• Melancholic depression is a severe subtype of major depressive disorder.
• Electroconvulsive therapy (ECT) is an effective treatment for severe depression.
• Optimizing ECT schedules and stimulus parameters is crucial for maximizing therapeutic outcomes.

Purpose of the Study:

• To compare the therapeutic efficacy of once-weekly versus three-times-weekly electroconvulsive therapy (ECT) schedules for melancholia.
• To investigate the impact of high versus low stimulus dose levels on ECT efficacy.
• To identify patient characteristics that may predict response to less frequent ECT schedules.

Main Methods:

• A comparative study design was employed to assess ECT schedules and stimulus doses.
• Patients with melancholia received ECT under different frequency (once vs. three times weekly) and stimulus intensity (high vs. low) conditions.
• Therapeutic efficacy was evaluated based on remission rates and time to remission.

Main Results:

• Three times weekly ECT demonstrated superior efficacy compared to once weekly ECT for melancholia.
• A high stimulus dose did not improve the efficacy of the once-weekly ECT schedule.
• Patients who achieved remission did so over a similar timeframe irrespective of the ECT schedule.
• A significant proportion (55%) of patients responded to once-weekly ECT.

Conclusions:

• While three times weekly ECT is more efficacious, once weekly ECT can still yield substantial response rates in melancholic patients.
• Further research is needed to identify specific patient subgroups who may achieve sufficient therapeutic benefit from a less intensive, once-weekly ECT regimen.
• The findings support the continued use of ECT for melancholia while highlighting opportunities for treatment personalization.