Vascular Dementia: Causes, Symptoms, and Treatments
Vascular dementia refers to changes to memory, thinking, and behavior resulting from conditions that affect the blood vessels in the brain. Cognition and brain function can be significantly affected by the size, location, and number of vascular changes.
Symptoms of vascular dementia can begin gradually or can occur suddenly, and then progress over time, with possible short periods of improvement. Vascular dementia can occur alone or be a part of a different diagnosis such as Alzheimer's disease or other forms of dementia. When an individual is diagnosed with vascular dementia, their symptoms can be similar to the symptoms of Alzheimer's.
What causes vascular dementia?
Vascular dementia is caused by different conditions that interrupt the flow of blood and oxygen supply to the brain and damage blood vessels in the brain.
People with vascular dementia almost always have abnormalities in the brain that can be seen on MRI scans. These abnormalities can include evidence of prior strokes, which are often small and sometimes without noticeable symptoms. Major strokes can also increase the risk for dementia, but not everyone who has had a stroke will develop dementia.
Other abnormalities commonly found in the brains of people with vascular dementia are diseased small blood vessels and changes in "white matter" — the connecting "wires" of the brain that are critical for relaying messages between brain regions.
Researchers are investigating how these changes in the brain — and their underlying causes — are involved in the onset and progression of dementia. Research has shown a strong link between cardiovascular disease, involving the heart and blood vessels, and cerebrovascular disease, involving the brain, and subsequent cognitive impairment and dementia. This area of research is referred to as “vascular contributions to cognitive impairment and dementia,” or VCID. It is helping researchers better understand this connection and whether the methods used to prevent and treat cerebrovascular disease and heart disease could also help prevent dementia. Researchers investigating VCID are exploring diverse conditions that affect blood flow to and within the brain, including infarcts (an area of dead tissue resulting from a lack of blood supply), hemorrhages (bleeding from ruptured or damaged blood vessels), cerebral hypoperfusion (reduced blood flow), and small vessel disease in the brain such as that thought to be associated with white matter hyperintensities (white patches seen on brain MRI scans), and stroke.
What are the symptoms of vascular dementia?
People with vascular dementia may experience:
- Difficulty performing tasks that used to be easy, such as paying bills
- Trouble following instructions or learning new information and routines
- Forgetting current or past events
- Misplacing items
- Getting lost on familiar routes
- Problems with language, such as finding the right word or using the wrong word
- Changes in sleep patterns
- Difficulty reading and writing
- Loss of interest in things or people
- Changes in personality, behavior, and mood, such as depression, agitation, and anger
- Hallucinations or delusions (believing something is real that is not)
- Poor judgment and loss of ability to perceive danger
How is vascular dementia treated?
Because many different disease processes can result in different forms of vascular dementia, there may not be one treatment for all. However, vascular dementia is often managed with medications to prevent strokes and reduce the risk of additional brain damage. Some studies suggest that medications that are used to treat Alzheimer's might benefit some people with an early form of vascular dementia. Treating modifiable risk factors like high blood pressure, diabetes, high cholesterol, and problems with the rhythm of the heartbeat can help prevent additional stroke. Living a healthy lifestyle is important to help reduce the risk factors of vascular dementia.
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November 01, 2021