My dad is currently on respiratory system,this is his second time.First time he ended up on respiratory system was in September,thankfully he made it.When he was let go from the hospital,they put him on oxygen at home care.He was having some good and some bad days.In September they discoverd he has heart failure (he is 60yo) but the problem is that they can't find the cause of his heart failure.Treatment they are giving him clearly doesn't work and I don't know what to do.I came here to ask a question to possibly see if there is anyone similar to him and what is the process in treatment if they can't find the cause and treat that cause?I hope there is hope..Thank you and sorry if my english is not good.