Which statement best describes the cause of vascular dementia?

Which statement best describes the cause of vascular dementia?

• A. Abnormal protein deposits in the brain due to Lewy bodies
• B. Dementia due to Alzheimer's disease pathology
• C. Damage to brain due to stroke or heart attack causing infarct
• D. Dementia from frontotemporal lobar degeneration

Answer: (C)

Vascular dementia stems from cerebrovascular disease that damages brain tissue through strokes and infarcts. When a stroke or multiple small vessel injuries cause areas of the brain to lose blood supply, neurons in those regions die, leading to cognitive decline. Clinically this often shows a stepwise pattern of worsening after each vascular event and is frequently accompanied by problems with executive function, slowed processing, and sometimes focal neurological signs. Imaging commonly reveals infarcts, white matter changes, or extensive vascular damage. This differs from Alzheimer's disease pathology, which centers on amyloid plaques and tau tangles, and from Lewy body dementia, which involves abnormal alpha-synuclein deposits with features like fluctuations and visual hallucinations, or frontotemporal degeneration, which primarily affects behavior and language due to frontal/temporal atrophy. Thus, the best description of the cause is brain damage from stroke or heart-related infarcts causing vascular injury.

Vascular dementia stems from cerebrovascular disease that damages brain tissue through strokes and infarcts. When a stroke or multiple small vessel injuries cause areas of the brain to lose blood supply, neurons in those regions die, leading to cognitive decline. Clinically this often shows a stepwise pattern of worsening after each vascular event and is frequently accompanied by problems with executive function, slowed processing, and sometimes focal neurological signs. Imaging commonly reveals infarcts, white matter changes, or extensive vascular damage.

This differs from Alzheimer's disease pathology, which centers on amyloid plaques and tau tangles, and from Lewy body dementia, which involves abnormal alpha-synuclein deposits with features like fluctuations and visual hallucinations, or frontotemporal degeneration, which primarily affects behavior and language due to frontal/temporal atrophy. Thus, the best description of the cause is brain damage from stroke or heart-related infarcts causing vascular injury.