Masks may reduce heart attacks by filtering air pollution, study finds

Japanese scientists found mask-wearing during the pandemic reduced certain heart attacks. Masks filtered harmful air particles, protecting against artery spasms. The study linked widespread mask use to fewer myocardial infarctions with non-obstructive coronary arteries, common in women and younger people. Polluted air exacerbates this condition. Researchers suggest fine particles in polluted air can trigger these heart attacks by releasing substances into the bloodstream.