@JPTC,
I understand your situation, i had similar cases in my family on the past, and as a child that drag me in parto to study medicine. Since then i had treated many similar patients during my years since i ended med school. I live on a country which culture is really prone to prefer those so called "natural" or "hollistic" and "alternative" treatments. What i will tell you may not be pleaseant. I don´t think it is what you are expecting to read. And i have to advise this is going to be long.
First, don´t belive in what you find on the internet. We, doctors, prefer to rely on medical approved magazines with long time known reputation to get new treatments and advences on therapies. There are a lot on scams on the internet. Medicine is a science, and as in astrophysiscs and in biochemestry everything is about applying scientific method and open to debate. No one can claim absolute knowledge or a final answer for everything. Be very skeptic of what you read on the web.
Second, you give very few information about your mother´s background. So i can only try to guess a few things. The treatment your mother has seems to be PERFECT. I would´t try to move anything with the exception of the ranitidine for only to used when necessary, and the folate and the iron suplement only if theres an actual laboratory test proving that are necesary at the moment.
Third, I´d herad many times threw the years the same ideas in patients and their families. What about natural treatment? What i always answer is: there is nothing more natural than allopatic medicine (medical medicine).
Considering allopatic medicine as unnatural is completely stupid since all the medical knowledge we have comes from close observation of nature and the application of the scientific method. For example the warfarin was discovered from cattle that ate spoiled sweet clover that induced an haemorragic disease. Digoxin comes from an extract of the digitalis plant. Salicilates come from the bark of the oak tree. Studing the natural mechanism of blood flow, blood viscosity and resistance of the vascular system provided some heroic medical engineers the knowledge to built those prosthetic valves she uses.
Fourth. Those so called natural treatments produce the same, or even more, strain to the liver as allopatic drugs. The problem with herbal therapies, which they actually work, is that is imposible to calculate the concentration of a drug within the plant. Many factors can alter the concentration, ranging from the quality of the soil, the amount of sun the palnt recieve, its competition with other plants, etc. Allopatic drugs have the exact same amount of a substance always.
Fifth. How we treat our body on the youth ALWAYS pays a toll, atr one time or another. There are stories of incredible people that smoke and drunk alcohol for 60 years of their life and are healthy, they have a very lucky genetic code. Must humans do not have that luck. So the bad things we do and the good things we didn´t sooner or later start to cause a damage on our organs that is beyond repair. The simple passage of time causes loss of functions on our organs, and bad habits increase the velocity of the harm. The treatment your mother is not curative it is only meant to diminish the likelyhood of complications, increase the probablility of a longer lifespan, and to try to ensure the best possible quality of life. All of this on a woman that is probably overweight, with bad collateral circulation of a heart that did a few exercise on her life and had multiple open chest surgeries, that consumed a lot of fats threw many many years, and a heart that is tired since many years ago (i am almost sure she has congestive heart failure stage C, NYHA classification III). I could continue enlisting, but i don´t think i made my point.
So do not abandon allopatic medicine. i can assure you that without the current regime she would surely wouldn´t be with you right now.
I recommend strongly two things. Search for a second opinion with an integrative type speciality doctor, a internal medicine doctor if she has less than 65 years or a geriatric specialist if she has more than 65. Sometimes subspecialist like cardiologist and neumologists and surgeons commit the error of concentrate only on their organ problem and do not see the patient as a hole. And many more commit the worst error which is not taking time to explain the disease, the treatment plant, and the possible outcomes of a patient. And search for a thanatologist they not just help people cope with death but also with lifethreatening diseases.
My last recommendation could had sounded rough. Sometimes i had been considered by others as cold hearthed. But as a doctor, as a human been, and as a friend, i like to speak this things bluntly as i would have liked that someone had told me this things when i suffered my own personal an familiar tragedies.