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A quantitative MRI study of vascular dementia
C K Liu1, B L Miller, J L Cummings
1Department of Neurology, Harbor-UCLA Medical Center.
Neurology
|January 1, 1992
Summary
White matter lesions and ventricle-to-brain ratio on MRI scans are key indicators of dementia after stroke. These factors, along with infarction size, help predict cognitive decline in stroke survivors.
Area of Science:
- Neurology
- Radiology
- Neuroimaging
Background:
- Stroke is a leading cause of disability, and post-stroke dementia is a significant complication.
- Identifying factors predicting dementia after stroke is crucial for patient management and prognosis.
Purpose of the Study:
- To investigate MRI and clinical factors associated with dementia in stroke patients.
- To determine the predictive power of these factors for classifying demented and non-demented stroke patients.
Main Methods:
- Retrospective analysis of MRI scans and clinical data from 53 stroke patients (24 with dementia, 29 without).
- Quantification of ventricle-to-brain ratio (VBR), white matter lesion (WML) area, and infarction areas (cortical, subcortical, and regional).
- Discriminant analysis was used to assess the classification accuracy of identified factors.
Main Results:
- Total WML area, left WML, VBR, right WML, age, left cortical infarction area, left parietal infarction area, and total infarction area were strongly correlated with dementia.
- These factors achieved a classification accuracy of 96% for non-demented and 75% for demented patients.
- Both cortical and white matter infarction areas were significantly associated with dementia, with a stronger link to left-hemisphere lesions.
Conclusions:
- MRI-derived measures, particularly white matter lesion burden and ventricle enlargement, are significant predictors of dementia post-stroke.
- Infarction extent and location, especially in the left hemisphere, also contribute to dementia development.
- Age is the primary demographic factor associated with post-stroke dementia.