I am sorry to hear about your mother and fully understand your concern and worry. I am not a doctor and what I know about the disease I have learned in the past four months. What you are asking for none of us are able to answer. I can tell you that a late diagnosis is not a good thing. One question I have is has your mother had an echocardiogram? If she has had one your cardiologist should be able too provide you with a prognosis. My wife has AL and the number one problem I have had is the lack of communication between all her doctors. If you do not educate yourself on this disease you are not able to understand a lot of what is being said. It has multiple implications and organ involvement any one of which could fail if not caught early enough. It also sounds like you may have already got your answer and I would suggest that you spread the love with not only mom but all your family, and know that god is watching over you. These are hard times for you and your family and they will need a strong loving person like yourself.