Pathophysiology and probable etiology of cerebral small vessel disease in vascular dementia and Alzheimer's disease.
Level 5 - mechanism / opinion, no new human data
Narrative review of mechanistic pathophysiology without systematic review methodology or new empirical human data
PubMed 37434208 · doi:10.1186/s13024-023-00640-5
What was done
This narrative review summarizes literature on the pathophysiology and proposed etiological mechanisms of cerebral small vessel disease (cSVD) in vascular cognitive impairment and dementia (VCID) and Alzheimer's disease (AD).
What was found
The abstract reports no original experimental numbers or meta-analytic data. It notes that VCID accounts for 20% of dementia cases and commonly coexists with AD. Pathological features include arteriolosclerosis and cerebral amyloid angiopathy affecting arterioles, capillaries, and venules, marked on imaging by white matter hyperintensities, subcortical infarcts, lacunes, enlarged perivascular spaces, microbleeds, and brain atrophy. Identified pathways include hypoperfusion/hypoxia, blood-brain barrier dysregulation, brain fluid drainage disturbances, and vascular inflammation.
Why it matters
Elucidating the heterogeneous mechanistic drivers of cSVD beyond standard cardiovascular risk factor management is needed to identify targeted diagnostic markers and causal therapeutics for vascular and mixed dementias.
Limits
This is a narrative review presenting mechanistic reasoning rather than new empirical clinical data or systematic quantitative synthesis. No specific sample sizes, effect estimates, or study counts are provided in the abstract.
Cited by
- supports Cerebral small vessel disease is the second most common form of dementia behind Alzheimer's disease.