Holmén J, Herlitz J, Ricksten SE, et al. - To correctly understand how ambulance response time could influence the outcome after out‐of‐hospital cardiac arrest (OHCA), this study was undertaken using data from the SRCR (Swedish Registry of Cardiopulmonary Resuscitation). This study involved a total of 20,420 cases of OHCA occurring in Sweden between 2008 and 2017. The primary outcome was survival to 30 days. Findings demonstrated that in association with increase in ambulance response times, there was reduction in survival to 30 days following a witnessed OHCA. This link was observed independently of initial rhythm and if cardiopulmonary resuscitation was carried out prior to emergency medical services (EMS)‐crew arrival. Shortening EMS response times was suggested to be a possibly fast as well as effective way of increasing survival in OHCA.