It is still used in some countries as an instrument of torture, used without anaesthetic. According to MInd, the mental health charity here, memory loss is still a big issue.
"This is the most important side effect of ECT, and the one which causes most concern.
It is usually a short-term effect, and most people find their memories gradually return as they recover from ECT.
However, for some people, memory loss can mean both losing personal memories, and having difficulty remembering new information. Some people have been so badly affected that they have lost key skills or knowledge, such as expertise needed to continue their professional work or career.
Longer term effects include:
- apathy (loss of interest in things)
- loss of creativity, drive and energy
- loss of emotional responses
- difficulty learning new information"
It is a so called treatment because no one knows, still after all this time, how it works and the odds of it helping aren't huge. It's a last resort to be used, in the UK at east, only after everything else has.