Glycopyrrolate versus atropine in post-ECT amnesia in the elderly

Area of Science:

• Neuroscience
• Pharmacology
• Geriatric Psychiatry

Background:

• Acetylcholine plays a crucial role in memory, with low levels linked to cognitive impairment.
• Anticholinergic drugs like atropine can cause amnesia, confusion, and delirium.
• Electroconvulsive therapy (ECT) is a treatment for major depression that can also affect cognition.

Purpose of the Study:

• To investigate whether atropine, a central anticholinergic, exacerbates ECT-induced cognitive side effects more than glycopyrrolate, a peripheral anticholinergic.
• To compare the effects of atropine versus glycopyrrolate as preanesthetic agents on memory and confusion following ECT.

Main Methods:

• A randomized study involving 20 geriatric patients with major depression undergoing ECT.
• Patients received either atropine or glycopyrrolate as a preanesthetic.
• Cognitive function was assessed using the Buschke Selective Reminding Task (BSRT) and other measures, with patients matched for age and depression severity.

Main Results:

• No significant difference was observed in cognitive outcomes between the atropine and glycopyrrolate groups.
• Both preanesthetic agents resulted in comparable levels of amnesia and confusion post-ECT.

Conclusions:

• Atropine, when administered before ECT, does not appear to be more detrimental to memory function than glycopyrrolate.
• The choice between atropine and glycopyrrolate as a preanesthetic for ECT in geriatric patients with depression may not significantly impact cognitive side effects.