Very few, if any. They used to do electric shock, insulin shock, etc. to my Grandmother, but it didn't do a bit of good. But, when she had her hip replaced it "fixed her brain". 

True story. Get a second opinion from another Doctor.

Tell yours you are going to do it yourself, like Charles Darwins Uncle. He would tie patients into a chair that he could spin, and he would spin the patient until they started bleeding out the ears. That was the beginning of schock therapy, and that is where it should have stayed.

Go buy a battery charger and hook your Dr. up to it. See if it makes him any smarter.

As a general rule, ECT is of no medical value. Check with A.M.A.