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Long-Term Exposure to Air Pollution Associated with Early Signs of Heart Damage

  • Researchers led by Kate Hanneman, M.D., published a July 1, 2025 Radiology study linking long-term air pollution exposure to early heart damage in Toronto and other sites.
  • The study evaluated 694 patients between 2018 and 2022, including 493 with dilated cardiomyopathy and 201 healthy controls, to explore pollution's effects on myocardial fibrosis.
  • Researchers found fine particulate matter exposure associated with greater diffuse myocardial fibrosis, especially in women, smokers, and patients with hypertension.
  • For every 1-µg/m³ rise in PM2.5 exposure, patients with cardiomyopathy exhibited an increase of 0.3 in their native T1 z score , while controls showed a 0.27 increase , suggesting greater myocardial scarring.
  • The findings underscore air pollution as a cardiovascular risk factor and highlight a need for public health measures to reduce exposure and improve air quality globally.
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Research warns even low levels of air pollution can hurt hearts

Long-term exposure to air pollution is associated with early signs of heart damage.

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Medical Xpress broke the news in on Tuesday, July 1, 2025.
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