Grunau B, et al. - Researchers investigated the association between advanced life support (ALS) response interval and patient outcomes in this secondary analysis of consecutive adult out-of-hospital cardiac arrests (OHCAs) (2006–2016) in British Columbia. They included 12,722 cases, 12% of which survived to discharge. Median response interval was 6.4 minutes and 11.8 minutes (IQR 8.7–16.5) for the first emergency medical services (EMS) unit and for ALS, respectively. Earlier ALS arrival was noted to be associated with improved survival and favorable neurological outcomes in the tiered EMS system. They suggest that patient outcomes could be improved with ALS attendance within 10 minutes of the 9-1-1 call in tiered systems of prehospital care.