Dear dff,
I'm not sure I understand your question. From the information you gave me I would agree that his prognosis is not good. As far as his voice we really can't make diagnosis or treatment recommendation in this forum but only provide information. I would recommend calling the doctor who took care of him at the hospital and ask him to explain things to you again so that you can understand everything that is happening. And as I mentioned previously I would strongly suggest getting hospice involved at this point. The hospital should be able to help you in making those connections. Hope this helps answer your question.
Some people do get another shot at life after alcoholism, if they can abstain from alcohol. I suggest an inpatient alcohol treatment program, followed by AA, if he wants to live bad enough.
It's evident, that if he drinks again, he will die. This is his physical and perhaps emotional bottom. In some cases alcoholics are willing to accept their disease at this point and make a change.
I have close friends that have died from the physical results of alcoholism and friends that have died sober. No matter how much time he has, it's better to die sober.
My heart goes out to you with your brother. I can tell you have lots of questions and are not satisfied with the answers or lack of answers you are getting. I would agree with the doctor on the forum here that hospice is a good idea, and they are WONDERFUL at expaining every step along the way. My uncle just died and he was in hospice. At the funeral, his family expressed how good hospice was to them. And, there's always hope, maybe your brother can turn around. But it sounds like he's very sick with kidney, liver, and heart failure. If he's filled with fluid that could cause the voice problems.
In reference to the questions about your brother`s voice,the voice weakness or hoarseness could also be due to his heart being extremely enlarged, and causing compression of his laryngeal nerves.I`m no doctor,and I`m merely speculating.