A new analysis published in a Go Red for Women spotlight issue of the Journal of the American Heart Association reports a concerning rise in in-hospital mortality among younger adults experiencing their first severe heart attack, with young women facing a significantly higher risk of death than men. The study appears as part of the American Heart Association Go Red for Women initiative, launched in 2004 to address persistent awareness, prevention, and treatment gaps in cardiovascular disease, the leading cause of death among women.
Using data from the National Inpatient Sample, investigators analyzed 945,977 first acute myocardial infarction hospitalizations among adults aged 18 to 54 years between 2011 and 2022. Nearly 40% of cases were ST-segment elevation myocardial infarctions (STEMI), the most severe form characterized by complete coronary artery occlusion, while more than 62% were non-ST-segment elevation myocardial infarctions (NSTEMI), typically associated with partial occlusion. After adjustment for both traditional and nontraditional risk factors, in-hospital mortality for first STEMI increased significantly over the study period, with an absolute rise of 1.2%, whereas mortality for first NSTEMI remained largely unchanged.
Women were consistently more likely than men to die during hospitalization following both subtypes of myocardial infarction. Among patients with STEMI, the in-hospital death rate was 3.1% for women compared with 2.6% for men. For NSTEMI, approximately 1% of women died in the hospital compared with less than 1% of men. Importantly, the higher mortality observed in women was not explained by greater in-hospital complication rates. Despite experiencing similar complication profiles, women were less likely to undergo cardiovascular diagnostic and therapeutic procedures aimed at identifying and treating the underlying cause of myocardial infarction.
The analysis also highlights the evolving risk profile of younger patients with acute myocardial infarction. Traditional risk factors such as tobacco use and hypertension were common in both sexes. However, younger women were more likely than age-matched men to present with nontraditional risk factors. Low income emerged as the most prevalent nontraditional risk factor, particularly among women. Across both sexes, low income, chronic kidney disease, and non-tobacco drug use were more strongly associated with in-hospital mortality than several traditional risk factors. Moreover, mortality for both STEMI and NSTEMI in young women was more strongly linked to nontraditional than traditional risk factors, underscoring the importance of a broader risk assessment framework.
These findings challenge the perception that heart attack mortality improvements have been uniform across age and sex groups. While mortality trends appeared to plateau or decline after 2010, those gains were largely driven by older adults and men. Younger adults, especially women, continue to face measurable and in some cases increasing in-hospital mortality risk following a first myocardial infarction.
The clinical implications are significant. The data suggest that improved acute myocardial infarction risk assessments incorporating nontraditional risk factors may help reduce in-hospital mortality, particularly among young women. A more comprehensive evaluation that integrates social determinants of health, comorbidities such as kidney disease, and substance use patterns alongside traditional cardiovascular risk factors could enhance early identification of high-risk individuals and guide more tailored acute management strategies.
The large, nationally representative sample provides robust contemporary evidence that first myocardial infarction in younger adults remains a critical public health concern. For cardiologists and healthcare systems, the findings reinforce the need for equitable application of guideline-directed therapies, heightened awareness of sex-specific risk patterns, and expanded prevention strategies that extend beyond traditional cardiovascular risk models.
Reference
- Satish M, Walters RW, Wenzl FA, Safford M, Kini V. Sex Differences in Outcomes of Young Adults Hospitalized With First Myocardial Infarction From 2011 to 2022. J Am Heart Assoc. 2026 Feb 26:e46517. doi: 10.1161/JAHA.125.046517. Epub ahead of print. PMID: 41744115.