Association between EMS response time and return of spontaneous circulation in out-of-hospital cardiac arrest patients in Busan, South Korea

This study investigates the relationship between emergency medical services (EMS) response times and the return of spontaneous circulation (ROSC) in out-of-hospital cardiac arrest patients in Busan, South Korea. The findings indicate that shorter response times significantly improve ROSC rates, with the strongest association observed at response times under four minutes. The authors advocate for policy measures aimed at reducing response times to enhance patient outcomes in cardiac arrest situations.