I know someone who has been through ECT, and I had a similar reaction when I learned about it. It's not a treatment to be taken lightly (this followed a suicid

I know someone who has been through ECT, and I had a similar reaction when I learned about it. It's not a treatment to be taken lightly (this followed a suicide attempt), but at least in their case did cure severe depression in conjunction with more traditional treatment. My very lay-person understanding of the process is that the patient is knocked out with drugs before the electricity is applied - it sounds like a sort of hard reset of memories in the brain. The most obvious and lasting side-effect is memory loss; this person can't remember significant chunks of their life history, so has had to re-learn it from conversations, home movies, photos, etc.