Updates on vascular dementia

Abstract

Vascular dementia (VaD) is the second leading cause of dementia after Alzheimer's disease (AD). In comparison to AD, there is a decline in the incidence of VaD due to recent improvements in cardiovascular risk factors. Brain hypoperfusion and hypoxia due to vascular pathologies have been postulated as the primary disease mechanism of VaD. However, other factors such as neuroinflammation may also contribute to the development of VaD. Non-modifiable and modifiable risk factors have been attributed to VaD. The clinical features overlapping between AD and VaD create significant challenges for physicians. Newly developed biomarkers may potentially help differentiate VaD from other forms of dementia. Unlike AD, there is no Food and Drug Administration-approved drug or device for treating VaD. Current treatment options mainly target symptoms rather than slowing the development or progression of VaD. There are ongoing research studies testing the efficacy of various therapeutic strategies for VaD. In this narrative review, we will summarise current findings on epidemiology, attributed risk factors and disease mechanisms, as well as emphasise the importance of optimising lifestyle modifications and comorbid condition management in preventing or slowing down the development of VaD. Finally, current therapies and ongoing research studies of novel therapeutic interventions such as stem-cell therapy and neuromodulation are highlighted.

Keywords: Cerebrovascular Disorders; Cognitive Dysfunction; Neurodegenerative Diseases; Systematic Review.