Vascular cognitive impairment
Vascular cognitive impairment (VCI)—vascular dementia (VasD) in its severe form—is cognitive impairment due to cerebral ischaemic or haemorrhagic disease. VasD is the second most common cause of dementia in the United States. VCI and Alzheimer’s disease can coexist and synergistically worsen each other. Clinical features of VCI can vary, depending on which areas of the brain the vascular pathology affects. Individuals without a history of clinical stroke can still have VCI; small-vessel cerebrovascular disease can present as an insidious cognitive decline, rather than an abrupt functional change. Neuroimaging plays a key role in diagnosing VCI and distinguishing it from other aetiologies of cognitive impairment. Aggressive vascular risk factor modification helps prevent VCI and improves outcomes in VCI, and represents the most important intervention for this condition. Early detection of VCI maximizes the effectiveness of vascular risk factor modification. Cholinesterase inhibitors and memantine may offer some cognitive benefit in VCI.