Vascular dementia Vascular dementia is the second most common type of dementia. The blood supply to the brain is damaged or cut off. As a result, some brain cells die. This can happen either suddenly, following a stroke, or more gradually after a series of ‘mini–strokes’ or ‘infarcts’. These mini– strokes can be so small that they go unnoticed to begin with. Then the person might have a sudden change but remain stable until the next ‘mini– stroke’. Vascular dementia can also be caused by thickening of the walls of blood vessels in the brain, where the walls of these become thickened which in turn reduces the blood flow through the brain. With vascular dementia, people start to forget things and find day–to–day life harder to cope with. Vascular dementia can affect mobility and co-ordination more so, and symptoms can progress in a stepped development. E.g. symptoms may change over night rather than gradually.