This is Dr. David
I am sorry for your mother's situation
ECT is not practice often in the USA or europe anymore.
sorry about her psychosis.
she has tried all of the medications for her psychosis?
ECT is much safer today and is given to people while they're under general anesthesia usually.
they don't want her to eat because of the anesthesia and that can cause her to vomit.
so it would be better for her stomach to be empty.
they will monitor her blood pressure doing the ECT.
ECT today is much safer today because of the anesthesia used.
here is a good article on ECT therapy
let me know if you have questions.
the dangerous and risks of ECT are small
here is another good article