Judy,
Sorry to hear that your Mother is having such a difficult time. Her situation is certainly complicated and involved, and I'm sure, as you mentioned, this is only "the tip of the iceberg."
There is no easy answer to this situation. I suggest that you contact her physician and request a conference at a time and place that is convenient for him (and a time that he will not be rushed). This meeting should include the primary treating physician and possibly any main specialty consultant that is involved.
The purpose of the meeting is to obtain information about her condition, treatment, and prognosis. Also indicate that you have several questions for the phsyicians. This should not be an opportunity for confrontation. Your Mother's physician should be your ally and you should be working together in her care. You should know that physicians, as well as patients and families, also become frustrated when answers are not clear, and patients don't respond well to treatment. This is a chance to discuss face to face, your concerns about your Mother.
In addition, you should look through this website and read the sections on heart disease, high blood pressure, medications and side effects. This will give you a good educational base that will be helpful when you meet with the doctor.
I hope the situation improves. Thank you.
Martin Cane, M.D.