Published case studies of negative side effects of ECT (electric shock treatment) for depression - www.ect.org -
Individual case study is an important & necessary method of collecting evidence. It allows the nature & extent of amnesia, memory disability, & memory loss to be described in detail impossible to obtain in-group studies.
Consistency in individual case studies illustrates that ECT’s permanent effects have not changed over the years.

As Empty As Eve, by Berton Roueche; first published in the New Yorker 9/9/1974; reprinted in The Medical Detectives,
1981 “There weren’t just gaps in my memory. There were oceans & oceans of blankness. Yet there seemed to be kind
of pattern.  My childhood recollections were as strong as ever. The fog of amnesia increased as I came forward in time.
The events of past several years were the blurriest & blankest. Another area that didn’t seem to be affected was
ingrained habits: repetitive acts & procedures. I mean, I hadn’t lost my command of the English language.
I still knew the multiplication tables… But worst of all my problems was that I couldn’t seem to retain.
I couldn’t hang on to my relearning. Or only a part of it.  The rest kept sliding away again.”  www.ect.org

Electroconvulsive Therapy & Memory Loss: A Personal Journey, by Anne Donahue; The Journal of ECT, June 2000. -  
“My long-term memory deficits far exceed anything my doctors anticipated, I was advised about, or that are validated
by research. To the contrary, either I am 1 in 1,000, a complete anomaly, to be able to document memory loss still
remaining after 3 years & extending as far back as occurrences 8-9 years ago, or the profession in general,
after all these years of treatment with ECT, has still failed to identify & come to terms with the true potential risks.”   
 Cached   www.ect.org - Anne has pioneered legislature in Vermont where one needs to sign informed-consent paperwork
before receiving ECT.  Informed consent includes a more candid video for prospective ECT patients. 
Evidence for permanent memory & cognitive impairment is found in the neuro-psychological evaluations (standardized batteries of tests for brain damage, taking place over 2 or more days) obtained by individual survivors at their own expense; many of these are collected in the archives of the Food & Drug Administration, Docket #82P-0316.  Cached - www.ect.org