Vascular cognitive impairment and vascular dementia

Area of Science:

• Neurology
• Gerontology
• Neuroscience

Background:

• Current diagnostic criteria for vascular dementia (VaD) rely on Alzheimer-type dementia criteria, which are often inappropriate.
• This diagnostic approach fails to detect many VaD patients where memory loss is not prominent and overlooks significant brain injury without classical stroke features.
• Existing VaD criteria have poor reliability and diagnose the condition too late for effective early intervention.

Purpose of the Study:

• To introduce and define vascular cognitive impairment (VCI) as a broader concept to address the limitations of VaD diagnosis.
• To facilitate earlier detection of cognitive decline before dementia becomes clinically manifest and untreatable.
• To identify and address preventable risk factors for cognitive impairment, emphasizing both physical and mental health.

Main Methods:

• The study discusses the conceptual development of VCI criteria, acknowledging early stages and limited data.
• Proposes that VCI detection should prioritize sensitive rather than specific cognitive assessments.
• Suggests that neuroimaging evidence of any cerebrovascular disease may suffice for routine VCI documentation, without requiring specific localization.

Main Results:

• Existing VaD criteria, including focal signs and stepwise progression, are deemed inappropriate for VCI diagnosis.
• VCI criteria aim for sensitive detection of cognitive loss, unlike the specificity-focused VaD criteria.
• The conceptualization of VCI supports identifying and managing preventable risk factors.

Conclusions:

• Vascular cognitive impairment (VCI) represents a necessary evolution from vascular dementia (VaD) diagnosis.
• VCI criteria aim for early detection and intervention, targeting a broader range of cognitive deficits.
• Monitoring and treating both physical and mental health are crucial for managing VCI and preventing progression.