Firstly - has your father seen a cardiologist, it would seem to me to be a case of being managed by a cardiologist.
My husband has left sided heart failure, but a little different with right sided.
Right ventricular dilation, stretched out ventricle, our heart only remain efficient when it is small, bit like a bulging car tyre, not a good idea, so we change the tyre, not so simple with the heart.
Right ventricle pumps blood into our lungs, where we exchange oxygen for carbon dioxide.
One of the valves that stops the blood falling back into the heart by the effects of gravity tricuspid, is not closing properly, and allowing the blood the fall back, so no matter how hard his heart pumps, it cannot stop this.
Pleural effusion, - our lungs as I said previously exchange oxygen for carbon dioxide, this is water trapped in the bottom of the lungs, so he just doesn't have the lung tissue to exchange the gases, breathless, therefore build up of carbon dioxide in blood stream, dizzy.
From my experience with my husband, limited intake of fluids, 1 half litres a day, that's only about 6 cups of fluid in total, we were very strict, but with experience and on very hot days, he can increase his fluid intake, its a balancing act, fluid overload, I give him his frusemide tablets which make his kidneys work overtime to clear out excess fluid, but he does not need them all the time.
Husband does not get swollen ankles, this is a symptom of heart failure I afraid for most people, but a small number of people do not get the swollen ankles, so I have to be very aware, of his symptoms of fluid imbalance, cough, squeaky lungs that even I can hear, by putting ear to back.
Being overweight disaster area, you must be on the light end of normal with heart failure, husband at the moment needs to go on a strict diet to get his weight down again.
Exercise, he does 3-4km's each and every day, early in the morning, then potters around the house, hangs out washing, does dishes, plays in the backyard with his lawnmowers, he fixes all the local neighbours mowers as a hobby, and looks after about 6 beehives., weekly.
Nearly seven years ago now he was discharged from hospital, with the instructions from the Dr's keep busy, and keep active, letter to GP which we never saw for months said to GP, expected death date less than 30 days, well they were wrong there weren't they.
He is on blood pressure tablets that keep his blood pressure down, tablets that slow his heartbeat, as a dialated or damaged muscle needs rest, not possible to put heart up on a footstool, but you can slow it down.
We have listened very carefully to the cardiologist, tried to write down questions as they occur to us, and ask them at the next appointment, hit the library and read about heart issues, many of them don't apply to huband, but knowledge is power, and with this knowledge I have been able to use the correct medical words in the heart hospital, and unless the nurses and Dr's ask my directly are you a nurse, I don't bother to inform them otherwise. I believe it has made a difference in his care.
I have read Dr to Dr papers on the internet, many of no real interest, but all of them have educated me, about heart issues, and even asked my GP for his cardiology books which he has shared with me.
I have been able to ask why that tablet, when it causes issues with liver function, when his liver function is all ready in trouble during a recent virus. I was really angry the Dr's overlooked they were doing more damage.
I identified a electrical issue with his heart, and for 15 months nobody would believe what I was saying, about intermittent issues, pain in left arm, fading in and out, hard to describe, just not with me, until his heart dropped to 30BPM at home, drove him to heart hospital, and even when we arrived at ER even then they questioned what was going on, withdrew some of his tablets that can cause slow heartbeat, YEAHHHH right, and his heart dropped to 23BPM during the night, I went in early to meet the senior cardiologist and gave him a piece of my mind about his juniors, an their skills, to my shock the senior agreed with me, pacemaker installed late the same day.
Yes there is a lot they can do, medication etc, but you are part of the team as the patient as well.
Best wishes from a fellow heart failure patient to you and your family.