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Vascular Contributions to Cognitive Impairment in Late Life
Helena C Chui1, Liliana Ramirez Gomez2
1Department of Neurology, University of Southern California, 1540 Alcazar Street, CHP215, Los Angeles, CA 90033, USA.
Insights
Cerebrovascular disease (CVD) is a major cause of cognitive impairment. Managing vascular risk factors is key to reducing dementia risk and cognitive decline.
Area of Science:
- Neurology
- Neuroimaging
- Geriatrics
Background:
- Cerebrovascular disease (CVD) is the second leading cause of late-life cognitive impairment.
- Structural neuroimaging excels at detecting macrovascular events but struggles with microvascular changes and preclinical disease.
- Autopsy data reveal frequent co-occurrence of vascular and neurodegenerative pathologies.
Purpose of the Study:
- To highlight the limitations of current neuroimaging in detecting all forms of cerebrovascular disease.
- To emphasize the importance of a multifactorial approach to cognitive impairment, considering both vascular and neurodegenerative factors.
- To underscore the role of vascular risk factor management in preventing cognitive decline.
Main Methods:
- Review of existing literature on cerebrovascular disease and cognitive impairment.
- Analysis of neuroimaging capabilities and limitations.
- Synthesis of autopsy findings regarding co-occurring pathologies.
Main Results:
- Structural neuroimaging has limitations in detecting microvascular disease, blood-brain barrier changes, and preclinical CVD.
- Vascular and neurodegenerative conditions frequently coexist in individuals with cognitive impairment.
- Management of vascular risk factors is a proven strategy for reducing cognitive impairment and dementia.
Conclusions:
- A multifactorial approach is necessary for understanding and managing late-life cognitive impairment.
- Vascular health is critical for maintaining cognitive function and preventing dementia.
- Effective management of vascular risk factors offers a practical method for mitigating cognitive decline.
Abstract:
Cerebrovascular disease (CVD) is the second leading cause of cognitive impairment in late life. Structural neuroimaging offers the most sensitive and specific biomarkers for hemorrhages and infarcts, but there are significant limitations in its ability to detect microvascular disease, microinfarcts, dynamic changes in the blood-brain barrier, and preclinical cerebrovascular disease. Autopsy studies disclose the common co-occurrence of vascular and neurodegenerative conditions, suggesting that in late life, a multifactorial approach to cognitive impairment may be more appropriate than traditional dichotomous classifications. Management of vascular risk factors remains a proven and practical approach to reducing acute and progressive cognitive impairment and dementia.