Slightly similar to my Grandad Calumn ( brought my Dad up when his real Dad died). He was a heavy smoker (about 80 per day) had COPD, type 2 diabetes and arterial problems and early in March this year started to feel very tired and unwell with swollen legs. This progressed to chest pains and when we called the ambulance he had a left bundle branch blockage and was taken into hospital where they placed a stent. He was discharged 5 days later and later prescribed tablets for fluid because he was acquiring fluid in his lungs and legs caused by the fact that his heart wasn't pumping properly. He had a further bundle branch blockage and was readmitted and he's currently due for a scan next week to decide how to proceed with it long term, so to me ( and as you know I'm certainly not a medical person) it seems as though your father is similar in that although he hasn't had a heart attack his heart isn't pumping correctly and so is causing or allowing the fluid to build up that you have described. The tablets he currently takes at the moment for the fluid are Furosemide 40mg x2 daily and seem to have had a very good result so far, as his legs are no longer swollen, his chest seem clearer and he's feeling much better. There hasn't been a suggestion with him that the long term prognosis is particularly poor so far I don't think either which is something to be positive about. Other than this I'm afraid I can't help at all, but I'm sure Sqad will be along in a sec. Hope things go well for you and your Dad. xx