Answer by  
                                                                                          Richard88 (391)
                                                            
                          
                          
                                                           There is no exact prognosis, because the damage is randomly occuring, but generally a person with vascular dementia lives about one to four years. Unlike Alzheimer's, the dementia occurs from brain tissue death caused by small strokes, and the strokes are single events, not a gradual deterioration. The person often dies from complications of the strokes, not dementia itself.