Short Recap: Mother almost 90. Diagnosed several years ago with Mild Cognitive Impairment (MCI).Then a year ago diagnosed with depression. Also experiences delirium while in the hospital. She suffers from heart failure, advanced, so hospitalizations are frequent. Yet, to this day no diagnosis of dementia. In short, the doctors believe that she suffers depression and anxiety, (she is on medication for this), and delirium when she is in the hospital. I am really confused why they call it delirium as she seems to be having delusions: For example, she believed that a nurse was trying to drug her, when in fact, this person was trying to give her a blood clotting drug. I have just learned another thing now, after almost two years of wondering why she gets angry so often. As an example, we talk. She suddenly becomes very angry at me and attacks verbally something I have said. For the longest time, I could not make sense of how/why she would get angry. Then, the other day, I asked her a simple question when she again became angry: I said “what do you think I just said? . Her answer was nothing like what I had said at all or her answer would be “well what did you say? My question is: are they missing some of our words and filling in the gaps? Or what is it? What can I do to make this happen less? I also notice that in talks she moves from one unrelated subject o another and I am frequently lost. If anyone can relate to anything here or provide me with any information at all, I would be most grateful. Thank you all.