What Is Vascular Cognitive Impairment? A Guide for Patients and Their Families

Most people have heard of Alzheimer's disease. Far fewer have heard of vascular cognitive impairment, even though it is one of the most common causes of memory and thinking problems in older adults. Understanding the difference matters, because vascular cognitive impairment is directly linked to conditions millions of people are already managing.

Vascular cognitive impairment refers to changes in thinking, memory, attention, or problem-solving that occur because of damage to the blood vessels that supply the brain. Unlike Alzheimer's disease, which involves the build-up of specific proteins in the brain, vascular cognitive impairment is caused by the same forces that damage the heart: high blood pressure, diabetes, high cholesterol, smoking, and cardiovascular disease. When these conditions are poorly managed over years, they cause small injuries inside the brain.

What makes this particularly important is that vascular cognitive impairment is often silent in its earliest stages. Patients do not necessarily experience a sudden obvious decline. Instead, they might notice they are slightly slower at tasks, that multitasking feels harder, or that they occasionally lose track of what they were doing. Family members sometimes notice it before the patient does.

A landmark international consensus published by Sachdev and colleagues, involving 70 experts from over 30 countries and published in JAMA Neurology in 2025, established new diagnostic criteria for vascular cognitive impairment at preclinical, mild, and major levels. The preclinical level, where changes in the brain are present but thinking is still functioning normally, is precisely the stage where intervention can make the greatest difference.

A clinical pathological study by Oveisgharan and colleagues from the Rush Alzheimer's Disease Center, published in JAMA Neurology in 2022, found that pure vascular cognitive impairment was not rare. Among participants without significant Alzheimer's pathology, over 40% had cognitive impairment directly linked to vascular brain disease.

ReCOGnAIze is a 15-minute digital cognitive assessment specifically designed and clinically validated for the detection of vascular cognitive impairment. Published in Alzheimer's and Dementia in 2026, it achieved an accuracy of 0.90 AUC in a Singapore cohort. If your doctor is already monitoring your blood pressure or blood sugar, ask them whether a cognitive screening makes sense for you. Early detection is not a reason to worry. It is a reason to act.