Contradicting conventional wisdom, a new study published in Hypertension, a peer-reviewed journal of the American Heart Association, suggests that menopause may not be the driving force behind an increase in aortic stiffness in women after midlife. The research, part of the long-running Framingham Heart Study, found that pulse pressure—the difference between systolic and diastolic blood pressure—begins to rise about two decades before menopause, indicating that vascular aging starts much earlier than previously thought. This finding has significant implications for how healthcare professionals assess and manage cardiovascular risk in women.
The aorta, the body's largest blood vessel, receives oxygen-rich blood from the heart and delivers it to other organs. Over time, the walls of the aorta can stiffen, leading to wider pulse pressure. A wider pulse pressure means the heart is working harder and can cause damage to small vessels in organs such as the brain and kidneys. While high blood pressure is a well-known risk factor for cardiovascular disease, wide pulse pressure is increasingly recognized as an independent risk factor for heart disease, dementia, and kidney disease. The study's findings challenge the assumption that menopause is the primary trigger for these vascular changes.
Researchers analyzed data from 6,760 women and 3,248 men in the Framingham Heart Study, tracking pulse pressure over 14 years. They found that pulse pressure reached its lowest point and began to rise about a decade earlier in women (late 30s) than in men (late 40s). Importantly, the timing of menopause—whether early, late, or average—had no influence on when pulse pressure began to rise. This suggests that factors other than the final menstrual period are involved in the accelerated increase in pulse pressure in women after midlife. "To our huge surprise, our results suggest that factors other than the timing of the final menstrual period were likely involved in the accelerated increase in pulse pressure in women after midlife," said study senior author Gary F. Mitchell, M.D.
The implications are substantial. Current clinical guidelines for managing blood pressure do not include pulse pressure, but the study authors argue that healthcare professionals should pay greater attention to it, especially in middle-aged and older women. "Healthcare professionals should definitely consider pulse pressure in middle-aged and older patients – especially women – with high blood pressure," Mitchell said. He noted that women are often told that borderline high blood pressure can be monitored, but if pulse pressure is higher than 60 mm Hg (e.g., 130/70 mm Hg), it should prompt action. Greater attention to pulse pressure may also guide treatment, as high blood pressure with wide pulse pressure is less likely to respond to usual medications.
Samar R. El Khoudary, Ph.D., M.P.H., FAHA, who was not involved in the study, emphasized that vascular aging may begin years before menopause. "We shouldn't wait until menopause to start thinking about cardiovascular health," she said. "Midlife is an opportunity to identify cardiovascular risk early and intervene before disease develops." The study's limitations include its observational nature and reliance on self-reported menopause age, and most participants were of white European descent, so results may not apply to other groups.
For more information, visit the American Heart Association's website at heart.org or stroke.org.
