β€οΈ First responders didn't boost survival after cardiac arrest
The HeartRunner trial found that community first responders did not significantly improve 30-day survival after out-of-hospital cardiac arrest. This study took place in the Capital Region of Denmark and analyzed 2,060 suspected cardiac arrests on August 31, 2026. While survival rates were similar across different arrival times, responders doubled the rate of bystander defibrillation. Researchers suggest the benefit heavily depends on the time available before ambulance arrival. Future studies are needed in areas with slower emergency response times. π