Holmén J, Herlitz J, Ricksten SE, et al. - In Sweden over the past 30 years, the ambulance response time in out‐of‐hospital cardiac arrest (OHCA) has doubled and there was a substantial improvement in the odds of surviving an OHCA. Researchers here investigated the effect of ambulance response time on the outcome after OHCA, which is essential for further advancement in cardiac arrest care, using data from the SRCR (Swedish Registry of Cardiopulmonary Resuscitation). In this study, a total of 20,420 cases of OHCA occurring in Sweden between 2008 and 2017 were included. Decreased survival to 30 days after a witnessed OHCA was observed in correlation with increased ambulance response times. This correlation was observed irrespective of initial rhythm and whether cardiopulmonary resuscitation was conducted before emergency medical services (EMS)‐crew arrival. They suggest shortening EMS response times to be a fast and effective way of improving survival in OHCA.