In a groundbreaking shift for cardiovascular health, new research published in late February 2026 suggests that the current standards used to assess heart disease risk may be failing women by underestimating the danger of “minor” arterial plaque. For decades, the medical community has operated under the assumption that less plaque equals less risk. However, a major study published in Circulation: Cardiovascular Imaging reveals that for women, heart attack risk begins to skyrocket at much lower levels of plaque burden than it does for men.
The Findings: A Lower Threshold for Danger
The study, led by Dr. Jan Brendel and a team at Massachusetts General Hospital, analyzed data from over 4,200 patients in the PROMISE trial who were experiencing stable chest pain. On the surface, the statistics seemed to favor women: they had significantly lower total volumes of plaque and fewer “high-risk” soft plaques than their male counterparts. Specifically, women had a median plaque volume of 78 mm³ compared to 156 mm³ in men.
However, despite having roughly half the amount of “gunk” in their arteries, women experienced nearly identical rates of major adverse cardiovascular events (MACE), including heart attacks, hospitalizations for chest pain, and death.
The most startling discovery was the difference in “risk trajectories.” For men, heart risk began to climb when their total plaque burden reached about 28%. For women, that danger zone started much earlier—at just 20%. Furthermore, once that 20% threshold was crossed, the risk for women increased much more steeply and aggressively than for men.
Why the Difference?
Medical experts believe the disparity is rooted in basic biology. Women typically have smaller coronary arteries than men. Because the vessels are narrower, a small amount of plaque occupies a larger percentage of the available space, leading to more significant obstructions earlier.
“Our findings suggest that applying uniform thresholds across sexes… may underestimate risk in women,” noted Dr. Brendel. Essentially, what a doctor might call “mild” plaque in a man could be “moderate” or “high-risk” in a woman due to the scale of her cardiovascular system.
A Call for Personalized Diagnostics
This study serves as a wake-up call for how heart scans, such as Coronary CT Angiography (CCTA), are interpreted. For years, women have often been told their scans look “clear” or “low-risk” because their plaque levels didn’t meet the traditional (male-centric) benchmarks for concern.
Senior author Dr. Borek Foldyna emphasized that women are not “protected” by their lower plaque volumes. Instead, the medical community must move toward sex-specific interpretation of imaging data. By incorporating age and sex into risk calculators, doctors can better identify women who need aggressive intervention—such as statins or lifestyle changes—before a major cardiac event occurs.
The Bottom Line
Heart disease remains the leading cause of death for women globally, yet it is frequently diagnosed later and treated less aggressively than in men. This 2026 study provides a scientific roadmap for closing that gap. For women, the message is clear: even a “small” amount of plaque on a heart scan is a signal that should be taken seriously. As the medical field shifts toward “precision prevention,” understanding that a woman’s heart requires its own set of rules is the first step toward saving lives.
