Protecting Women's Hearts: Rising Heart Attack Deaths

Why the standard story of heart disease leaves women dangerously undertreated — and what emerging science is revealing about a different biological clock

For decades, the narrative around heart attacks has been shaped largely by research conducted on men. We know a great deal about how men develop heart disease, when it typically strikes, and how to treat it. But growing evidence suggests that women follow a fundamentally different biological timeline — one that our current tools and treatments weren't entirely designed to address.

Recent research reveals troubling trends: death rates after certain types of severe heart attacks are rising in young Americans among both women and men, and women are dying at higher rates than men. Understanding why requires looking beyond traditional risk factors and into the biology of how plaque builds — differently, on a different schedule — in women's arteries.

The Numbers Behind Rising Heart Attack Deaths

Heart attack death rates in the United States declined steadily for decades (Figure 1), a testament to advances in emergency medicine, interventional cardiology, and medications. But around 2011, that progress slowed (Dani, 2022). Among adults under 65, deaths from cardiovascular causes actually began to rise in some groups, with heart failure and valve disease contributing alongside heart attacks.

Figure 1. Twenty years of decreasing heart attack-related deaths.

More recently, data focusing on adults under 55 has identified a particularly concerning pattern with ST-elevation myocardial infarction (STEMI) — the most severe type of heart attack, caused by a sudden and complete blockage of a coronary artery (Satish, 2026). After years of improvement, STEMI death rates in younger Americans have been trending upward (Figure 2). And the burden is not falling equally between the sexes: women who suffer a STEMI are more likely to die than men who experience the same event.

Figure 2. Rising Rates of STEMI Deaths in Women and Men

Part of the explanation involves access to treatment. Women who suffer a STEMI tend to receive fewer interventional procedures — the catheterizations and stenting that can restore blood flow to a dying heart muscle. Whether that gap stems from upstream recognition of the heart attack, later hospital arrival, the anatomy of women's arteries themselves, or systemic bias remains an area of active investigation. Likely, all play a role to some extent.

A Different Kind of Plaque, in Smaller Vessels

To understand why women face distinct risks, it helps to understand coronary plaque — the material that builds up inside artery walls over a lifetime and can ultimately trigger a heart attack.

Not all plaque is the same. Calcified plaque is dense, stable, and detectable on CT scans such as coronary artery calcium (CAC) scoring CT's. Noncalcified plaque is softer, less visible on standard imaging, and — critically — more prone to rupturing and causing sudden blockages. Low-attenuation plaque, sometimes called "vulnerable" plaque, is the most dangerous subtype, associated with the highest risk of a sudden, catastrophic cardiac event. Detailed plaque calcification requires a specialized CT scan often referred to as a coronary computed tomography angiography (CCTA) or CT coronary angiogram (CTCA) -- they are the same test. CAC scoring cannot evaluate plaque fully, as it does not utilize intravenous contrast.

New research examining coronary CT angiogram scans in detail has found meaningful differences in how plaque distributes between men and women (Brendel, 2026). Women carry a higher proportion of calcified plaque and less of the dangerous low-attenuation variety. Men, by contrast, accumulate more of the soft, fatty, vulnerable plaque. On the surface, this might sound like good news for women. In practice, it is more complicated.

Women's coronary arteries are consistently smaller than men's. That anatomical reality means even a modest amount of plaque can produce significant obstruction in a woman's artery (Figure 3). A blockage that represents a manageable narrowing in a man's larger vessel may represent a critical obstruction in a woman's smaller one. Smaller, more obstructed arteries are also more challenging targets for the catheterization-based procedures used to open blockages during a heart attack — and may be more likely to be deemed unsuitable for intervention altogether.

Figure 3. Identical Plaque Volume Creates Greater Obstruction in Smaller Vessels

The fact that women have smaller arteries than men means that the same amount of plaque that may be a minor problem in men may be a serious, flow-limiting obstruction in women. Furthermore, as their arteries are smaller, the women's arteries may be too small for interventions such as stent placement.

Importantly, studies have found that plaque burden — the total volume of plaque — provides independent prognostic value in women beyond what standard risk calculators capture. The standard cardiovascular risk tools most clinicians use daily were built largely on male data. For women, those scores may systematically underestimate true risk, particularly when significant noncalcified plaque is present in smaller vessels.

Two Different Biological Clocks

Perhaps the most illuminating insight from recent research concerns timing. Long-term studies following young adults from their twenties into middle age have confirmed that men and women develop coronary artery disease on fundamentally different schedules — and that schedule is shifting.

Historically, men were thought to develop significant coronary disease roughly ten years earlier than women. A more recent study aimed to evaluate if modern rates of obesity, smoking, and diabetes changed the onset of coronary disease in men and women. New data suggests the divergence begins even sooner: men's cardiovascular event rates start rising as early as age 35 (Freedman, 2026). Women's risks, shielded in part by estrogen's protective effects on blood vessels, rise more gradually through the reproductive years.

But menopause changes everything.

This means that when a woman arrives at the emergency department with a STEMI, she may be doing so at a moment when her arteries have accumulated years of plaque that accelerated after menopause — smaller vessels now substantially burdened, with less physiological reserve than a man of comparable age. The window for effective intervention may be narrower. The arteries themselves may be less amenable to the tools designed to open them.

Beyond Traditional Risk Factors

One of the most striking findings in recent research is that these biological differences cannot be fully explained by the risk factors we routinely measure. High blood pressure, high cholesterol, diabetes, smoking — these are real and important. But even after accounting for all of them, the gender-based differences in when and how coronary disease develops persist.

This suggests the problem is not simply one of women having different levels of exposure to traditional risk factors. The underlying biology of plaque development — influenced by sex hormones, immune function, and factors not yet fully understood — differs between men and women in ways that traditional risk factor calculators cannot assess.

Women should be sure to download the "12 Essential Questions" handout we provide which goes through parameters unique to women and, if enough are present, suggests they are at substantially higher risk of heart disease. Take it to your own doctor so they are aware of your risk factors.

EH Risk Factors Women.pdf

Download PDF • 140KB

There is even an intriguing counterintuitive possibility: women with traditional risk factors like high blood pressure may actually be more engaged with the healthcare system, more closely monitored, and paradoxically better protected from sudden events than women who appear "healthy" by standard measures but carry significant hidden plaque burden. The absence of a risk factor flag should not be mistaken for the absence of risk.

Nontraditional Risks Matter, Too

The research also highlights factors beyond the standard checklist that influence outcomes in younger adults. Socioeconomic status, chronic kidney disease, and substance use carry meaningful weight in predicting who survives a heart attack. Geography and race compound these risks — with rural Black adults in the southern United States facing substantially higher mortality than white urban adults elsewhere in the country.

These disparities serve as a reminder that cardiovascular risk is shaped not only by biology and behavior, but by the social and structural conditions of people's lives — including how quickly someone can reach a hospital capable of treating a STEMI, a factor that plays a direct role in survival.

The Bottom Line for Women

Heart disease does not announce itself the same way in everyone. Women are more likely than men to experience atypical symptoms — fatigue, nausea, jaw or back pain, shortness of breath — rather than the classic crushing chest pressure. Delayed recognition, by both patients and clinicians, contributes to delayed treatment, and delayed treatment costs lives.

Understanding that women develop heart disease differently — on a different timeline, with different plaque biology, in smaller vessels — is not an abstract scientific point. It is the foundation for better decisions: about when to seek evaluation, which tests provide the most useful information, and how aggressively to intervene before a crisis occurs.

The science is telling us that the standard framework was built on an incomplete picture. Recognizing that is the first step toward a more accurate one.

References:

• Asaria P, et al. Contributions of event rates, pre-hospital deaths, and deaths following hospitalisation to variations in myocardial infarction mortality in 326 districts in England: a spatial analysis of linked hospitalisation and mortality data. Lancet Public Health. 2022;7(10):e813–e824. doi:10.1016/S2468-2667(22)00108-6

• Brendel JM, et al. Risk in women emerges at lower coronary plaque burden than in men: PROMISE Trial. Circ Cardiovasc Imaging. 2026. doi:10.1161/CIRCIMAGING.125.019011

• Dani SS, et al. Trends in premature mortality from acute myocardial infarction in the United States, 1999 to 2019. J Am Heart Assoc. 2022;11(1):e021682. doi:10.1161/JAHA.121.021682

• Freedman AA, et al. Sex differences in age of onset of premature cardiovascular disease and subtypes: the Coronary Artery Risk Development in Young Adults Study. J Am Heart Assoc. 2026;15(3):e044922. doi:10.1161/JAHA.125.044922

• Satish M, et al. Sex differences in outcomes of young adults hospitalized with first myocardial infarction from 2011 to 2022. J Am Heart Assoc. 2026;14:e046517. doi:10.1161/JAHA.125.046517

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