My dad has been diagnosed with it, they are saying it’s fluid in the lungs which is caused by heart failure, he is a heavy smoker and has diabetes / swelling on feet, doctor is not willing to tell us what the survival rate is that’s why I have come on here to ask as it doesn’t say anything on Google, is this reversible or can it never be cured? Can someone still live a long normal life? If someone can please give me some advice as not sure what to do, my family have been struggling to cope thanks