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Am J Psychiatry 1995; 152:995-1001
Copyright © 1995 by American Psychiatric Association
Predictors of retrograde amnesia following ECT
C Sobin, HA Sackeim, J Prudic, DP Devanand, BJ Moody and MC McElhiney
Department of Biological Psychiatry, New York State Psychiatric Institute, NY 10032, USA.
OBJECTIVE: Substantial progress has been made in identifying how the
treatment parameters used in ECT impact on cognitive side effects. However,
there is limited information regarding individual differences in
vulnerability to these side effects. The authors examined patients'
pretreatment global cognitive status and postictal orientation recovery
time as potential predictors of the magnitude of retrograde amnesia for
autobiographical memories after ECT. METHOD: Seventy-one inpatients with
major depressive disorder were randomly assigned to four ECT conditions
that varied in electrode placement (right unilateral versus bilateral) and
stimulus dosage (low versus high intensity). Orientation recovery time was
assessed at virtually every session during the course of ECT. Global
cognitive status was assessed with the modified Mini- Mental State
examination before treatment, during the week after termination of
treatment, and 2 months after treatment ended. Retrograde amnesia was
assessed at these same time points with the Autobiographical Memory
Interview. RESULTS: Pre-ECT global cognitive status and the duration of
postictal disorientation were strong predictors of the magnitude of
retrograde amnesia in the week after the course of ECT and at 2-month
follow-up. In general, these relationships were maintained regardless of
technical parameters in the administration of the ECT. CONCLUSIONS:
Patients who manifest global cognitive impairment before treatment and
patients who experience prolonged disorientation in the acute postictal
period may be the most vulnerable to persistent retrograde amnesia for
autobiographical information.
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Predictors of Post-ECT Retrograde Amnesia
Journal Watch Psychiatry,
August 1, 1995;
1995(801):
9 - 9.
[Full Text]
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