Pulse Wave Velocity May Predict Dementia Risk | Cardiology Today

A Routine Measurement, A Potential Early Warning: Blood Pressure and Dementia Risk

A readily available metric derived from standard blood pressure readings – estimated pulse wave velocity – may offer a new way to identify individuals at increased risk of developing dementia, according to research presented this week at the American College of Cardiology Scientific Session. The findings suggest that assessing arterial stiffness, a known consequence of uncontrolled hypertension, could allow for earlier intervention and potentially, preventative strategies against cognitive decline. This is particularly significant given that dementia represents a leading cause of mortality and morbidity globally.

Researchers analyzed data from over 8,500 participants in the SPRINT trial, a landmark study comparing intensive and standard blood pressure control. They calculated estimated pulse wave velocity (ePWV) using indicate blood pressure and age, with an average ePWV of 15.28 meters per second across the cohort. Over more than seven years of follow-up, 324 participants developed probable dementia. The study revealed that each 1 m/s increase in ePWV was associated with a more than twofold higher risk of dementia (adjusted HR = 2.11. 95% CI, 1.93-2.3).

“We realize that hypertension is a well-known modifiable risk factor for dementia,” explained Newton Nyirenda, MD, epidemiologist at Georgetown University, in an interview with Healio. “So we wanted to see if there are vascular measures that we can utilize to be able to pick up risk early on, because if you can pick up risk early on, then you can reach up with prevention strategies that could help address the disease.” The simplicity of calculating ePWV from routine measurements makes it a potentially valuable tool for clinical practice.

Understanding Arterial Stiffness and Brain Health

The connection between blood pressure, arterial health and dementia isn’t new. High blood pressure, over time, can lead to stiffening of the arteries – a condition known as arterial stiffness. This stiffness reduces the arteries’ ability to effectively deliver blood to the brain. Sula Mazimba, MD, MPH, associate professor at the University of Virginia and senior author of the study, explained the implications: “There are a lot of vessels in the brain, and they are small vessels, and those vessels when they start becoming stiff are not able to accommodate the auto-regulated blood flow to the brain, and over time you start getting ischemic changes to the brain because of stiffness of the vascular supply.” Ischemic changes refer to reduced blood flow, potentially leading to vascular dementia or stroke.

It’s significant to note that the study demonstrates an association, not necessarily causation. While higher ePWV is linked to increased dementia risk, it doesn’t definitively prove that arterial stiffness *causes* dementia. Other factors, such as genetics, lifestyle, and other health conditions, also play a role. The researchers emphasize that ePWV can help identify individuals who might benefit from more focused preventative measures.

What Does This Mean for Individuals?

The findings suggest that a simple calculation, based on readily available data, could help clinicians personalize dementia risk assessment. “You have certain patients… who have a higher risk of developing dementia based on the estimated pulse wave velocity and others who have a lower risk,” Nyirenda told Healio. “So it’s not the same for patients, and therefore by understanding this, we can sort of understand which patients we can pay more attention to and individualize prevention strategies for them.”

However, it’s crucial to understand that ePWV is just one piece of the puzzle. A high ePWV doesn’t guarantee someone will develop dementia, and a low ePWV doesn’t eliminate the risk. Maintaining a healthy lifestyle – including regular exercise, a balanced diet, and managing blood pressure – remains the cornerstone of dementia prevention. The American Heart Association offers comprehensive guidance on reducing your risk of dementia through cardiovascular health.

The Path Forward: Refining Risk Prediction

Researchers are continuing to investigate the role of vascular health in dementia development. Future studies will likely focus on refining risk prediction models by incorporating ePWV alongside other known risk factors. The goal is to develop more accurate tools for identifying individuals who would benefit most from early intervention. The findings from the SPRINT trial analysis will be formally presented at the American College of Cardiology Scientific Session, taking place March 28-30, 2026, in New Orleans.

The study authors emphasize the importance of continued research and monitoring. As Nyirenda noted, the calculation of ePWV utilizes routine measurements already obtained in clinical settings, making it a practical and accessible tool for assessing vascular health and potentially mitigating dementia risk.