About The Study: This study found that despite increased participation in U.S. long distance running races, the incidence of cardiac arrest during U.S. marathons and half-marathons remains stable. There has been a marked decline in cardiac arrest mortality, and coronary artery disease was the most common etiology among cases with sufficient cause-related data. Effective emergency action planning with immediate access to defibrillation may explain the improvement in survival.
Corresponding Authors: To contact the corresponding authors, email Jonathan H. Kim, MD, MSc ( jonathan.kim@emory.edu ) and Aaron L. Baggish, MD ( aaron.baggish@chuv.ch ).
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(doi:10.1001/jama.2025.3026)
Editor’s Note: Please see the article for additional information, including other authors, author contributions and affiliations, conflict of interest and financial disclosures, and funding and support.
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Media advisory: This study is being presented at the American College of Cardiology’s Annual Scientific Session.
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