Heart Murmur Failure Cat With Heart Failure....?

Cat with heart failure....? - heart murmur failure

So we have a cat we rescued 13 years ago 13 years. She always had health problems. Crystals in the urine. Many IE has always been to be on special food. For many years, had a heart murmur, but never really touched him so far. A few weeks ago, I noticed his breathing was laborious. She was breathing very fast, but without a murmur, drowned or something. He was acting normally otherwise, if I see just to see. And today was quite different. He has not and will not give you the right move, too. Do not eat, drink, sits down to litter box, nothing. So I took him to the vet and told him that he has a lot of fluid around the heart and is in heart failure. He received an injection of drugs in the hope of reducing the quantity of liquid, but they said they do not know how long he has. This medicine can really help or not. Has anyone been through this? What was the outcome? Thank you.