I have a question about Heart Worms, treatment and prevention and something a little extra?

I hope this don't sound too dumb. Now I know you give a dog heart worm treatments to prevent them and I am happy to do that with my pound puppies and my Buster Brown and any other dog I get. My neighbor was not so bright though and didn't do that. The vet told her the dog would die as he is sick or he could go ahead and euthanize the dog. The girl was crying as she did not do her research before she got a fog. Dumb I know but that was the case. I went with her to the vet cause I do know a little about dogs since I have some and know you need to know something before you get one. (And if you followed that...) Sorry...trying to get there. Just want ya'll to know I won't the dumb one here. Anyway, down past all the fine print I had heard of a surgery to stop a dog from dying, possibly, if the vet would try it. They go in and take out the heart worms that are clogging the heart. Then they wait till the dog is stronger if he survives that and start him on first the treatment, and if he survives that, the preventative. The neighbor told me I could have the dog if I would fight for his life that way. I took him to another vet cause this one told me what I was talking about could not be done. I have had it done to a dog I found before and he lived and is alive today. So I took the dog to another vet and will talk with him this morning to see what is going on. I told him what I wanted and he told me he would take care of it. What I am asking here, have any of you heard of this surgery before as I have been told by just about everyone after I dropped the dig at the other vets that I was going to call or go over there and find he was dead this morning. Now I know all I can do is call or go over, but someone tell me please have you heard about this surgery and what do you know about it? I guess I want to feel like I have given this poor dog a chance before I go walking in the vets office in a couple hours.And if I spelled something wrong it was a typo so ignore it.