A series of recent studies have identified associations between various cardiovascular health indicators and an increased risk of developing dementia or having dementia listed as a contributing cause of death. While the studies do not establish causation, they provide additional evidence for the relationship between vascular health and cognitive decline.
Study on Genetic Risk for Pulse Pressure and Dementia-Related Death
A study published June 3, 2026, in the journal Neurology examined the relationship between genetic predisposition to high pulse pressure and dementia. The analysis included 8,818 participants with an average age of 64, who were followed for up to 14 years. During the follow-up period, 456 deaths had dementia listed as a contributing cause.
Key findings from the study include:
- Higher polygenic risk scores for pulse pressure were associated with a 16% increased risk of having dementia listed as a contributing cause of death.
- No strong associations were found between polygenic risk scores for other cardiometabolic conditions—such as blood pressure, diabetes, or stroke—and dementia-related death or cognitive impairment.
- The study examined cumulative effects of many small-effect genetic variants rather than the APOE ε4 allele, which is the strongest known genetic risk factor for Alzheimer's disease.
- Researchers noted the study does not prove causation and that statistical power to detect small effects was limited.
Pulse pressure is defined as the difference between systolic and diastolic blood pressure. High pulse pressure can indicate poor heart health, such as arterial stiffness.
The study was supported by the National Institutes of Health.
Studies on BMI and Blood Pressure as Direct Risk Factors
Two separate studies published in The Journal of Clinical Endocrinology & Metabolism identified direct causal links between higher BMI, high blood pressure, and increased dementia risk.
Researchers analyzed data from large European populations in Copenhagen and the United Kingdom. Using a Mendelian randomization design—which mimics a randomized controlled trial by using genetic variants as proxies—the studies found that for approximately every 4.5-point increase in BMI, the risk of vascular dementia rose across all BMI ranges. Additional analysis indicated that elevated blood pressure, in conjunction with BMI, directly contributed to this increased risk.
Vascular dementia results from damage to blood vessels, which reduces blood and oxygen flow to the brain. This damage is frequently caused by underlying health issues such as high blood pressure, atherosclerosis, or diabetes.
Dr. Ruth Frikke-Schmidt, a study co-author and clinical professor at the University of Copenhagen, stated that being overweight and having high blood pressure are direct causes of increased vascular dementia risk, making them actionable targets for prevention at a population level. She also noted that while weight-loss medication has been tested for halting cognitive decline in early Alzheimer's disease without beneficial effect, an unanswered question is whether early weight-loss intervention, initiated before the onset of cognitive symptoms, could offer protection against dementia.
Studies on Blood Pressure-Derived Vascular Health Metrics
Research presented by a team from Georgetown University and the University of Virginia examined whether measures of blood vessel health derived from routine blood pressure readings could assist in identifying adults at increased risk for dementia.
The studies analyzed 8,536 participants from the SPRINT trial, a multicenter study involving adults aged 50 and older with hypertension. Over the follow-up period, 323 participants developed probable dementia.
Key findings included:
- One study demonstrated that the pulse pressure-heart rate index—calculated from heart rate and blood pressure—independently predicted dementia risk in adults over age 50. Participants with a higher pulse pressure-heart rate index before age 65 had a significantly higher risk of developing probable dementia or mild cognitive impairment, with each unit increase associated with a 76% higher risk.
- A separate study found that adults with persistently elevated or rapidly increasing estimated pulse wave velocity—a marker of vascular aging derived from age and blood pressure—were significantly more likely to develop dementia compared to those with stable vascular profiles.
- Participants with a higher estimated pulse wave velocity profile also demonstrated increased dementia risk, even after accounting for clinical factors such as age, sex, kidney disease, cardiovascular history, and smoking.
Newton Nyirenda, MD, an epidemiologist at Georgetown University and lead author, stated that blood pressure management is important not only for preventing heart attacks and strokes but also for preserving cognitive health. Sula Mazimba, MD, associate professor at the University of Virginia and senior author, advised clinicians to individualize risk assessments and tailor treatment strategies.
As a post hoc analysis of clinical trial data, the study cannot establish causation. Participants had hypertension and elevated cardiovascular risk, meaning findings may not be generalizable to lower-risk populations. Further studies are required to validate clinically actionable thresholds and determine if modifying vascular aging trajectories reduces dementia risk.
Context on Dementia and Prevention
Dementia is characterized by a severe decline in mental abilities such as memory, thinking, and reasoning. The condition is a progressive brain disease causing nerve cell damage that worsens over time, affecting memory, language, problem-solving, and behavior. Common forms include Alzheimer's disease, vascular dementia, and mixed dementia.
According to the American Heart Association, normal blood pressure is below 120 (systolic) over 80 (diastolic). Untreated high blood pressure can lead to significant health complications.
Dementia and age-related cognitive decline rates are projected to increase as global populations age. Concurrently, nearly half of U.S. adults experience high blood pressure, often without awareness. Guidelines identify blood pressure as the most prevalent and modifiable risk factor for cardiovascular diseases and vascular damage-related dementia.
Experts suggest that many dementia cases may be preventable, and the studies reinforce the importance of targeting risk factors such as elevated BMI and cardiovascular disease to preserve brain health. Recommendations include maintaining a healthy weight and managing blood pressure through diet, exercise, and routine medical care.