Gässler H, et al. - Researchers retrospectively investigated all pre-hospital cardiopulmonary resuscitations (CPR) documented in the German Resuscitation Registry between 2007 and 2017 to determine the frequencies of different causes of out-of-hospital cardiac arrest (OHCA) and their outcomes. In total, they investigated 33,772 patients. Cardiac events (62.2%), hypoxia (11.1%), and trauma (3.2%) were the most common causes of OHCA; in 17.2%, no or unknown cause were documented. Wide variation in return of spontaneous circulation rates was noted, ranging between 8.9% (sudden infant death syndrome) and 64.4% (intracranial bleeding), with a survival rate with good neurological outcome ranging from 0.9% (sepsis) to 14.0% (intoxication).