In this JACC Deep Dive episode, Editor-in-Chief Dr. Harlan Krumholz discusses a major study on sudden cardiac arrest in young competitive athletes, highlighting survival rates, causes, and racial disparities. The study shows that survival improves dramatically with immediate AED use and has increased over time, emphasizing the need for widespread emergency preparedness and health equity efforts.. While progress has been made, ensuring universal access to CPR training and AEDs remains critical to saving lives.