My father died on Christmas eve in the night. He had alzheimers for about 5-7 years. Was diagnosed 2 years ago. His dementia medication was halved a couple of weeks before he died. He went downhill fast and the last week he spent in bed, last two days in hospital. The hospital now say they won't release him until a post-mortem is done as he had no infection or anything showing up on heart or brain scans. His heart just stopped. The last week in bed he seemed half unconscious and sort of delirious, not eating or drinking, not able to move. He was 72. Is the very last stage of alzheimers this quick??