Multi-Infarct Dementia
Multi-infarct dementia (MID), also known as vascular dementia, generally affects people between the ages of 60 and 75, and affects more men than women. MID is often a result of a series of small strokes, called ministrokes or transient ischemic attacks (TIAs). MID occurs when blood clots block small blood vessels in the brain and destroy brain tissue. The damage is usually gradual and effects are not immediately noticeable.

The most important risk factor for multi-infarct dementia is high blood pressure. It is rare for a person without high blood pressure to develop multi-infarct dementia.