Causes
Vascular dementia occurs when there is a decrease in the blood supply to the brain due to diseased blood vessels. The brain relies on a continuous flow of blood to deliver oxygen and nutrients to its cells, and this is made possible through an intricate system of blood vessels. However, if these blood vessels become damaged, it can lead to blockages or the leakage of blood into the brain tissues. As a result, the brain cells do not receive enough blood, causing them to die. This process is similar to a stroke.
Understanding Post-Stroke Vascular Dementia
Post-stroke vascular dementia can occur as a result of a stroke, which is often caused by the narrowing or blockage of a blood vessel. This clot formation can happen within the brain or in the heart. The severity of the resulting dementia depends on which blood vessel is affected and whether the interruption to the blood supply is permanent or temporary. In some cases, this condition can lead to post-stroke dementia.
Occasionally, the interruption to the blood supply is due to a blood vessel leakage and subsequent bleeding into the surrounding brain, resulting in a stroke. However, it’s important to note that not everyone who experiences a stroke will develop dementia. Approximately 20% of individuals will develop post-stroke dementia within six months following the stroke.