The use of mobile phones in out of hospital cardiac arrest to increase bystander CPR

Death from cardiac disease is one of the most common causes of death in the western world. The majority of these deaths takes place outside hospital as sudden cardiac death. However, with immediate (within minutes) actions such as cardiopulmonary resuscitation (CPR) and defibrillation many lives would be saved. CPR is a key factor to increase survival from Out of Hospital Cardiac Arrest (OHCA). CPR buys time by supporting the brain with some circulation in waiting for a defibrillator that can restart the heart. In Sweden about 2,5 million people are trained in CPR. However, only about half of all OHCA victims will get CPR in waiting for ambulance arrival. The aims of the Response to Urgent Mobile message for Bystander Activation (RUMBA) trial is to try a new way of logistics to increase bystander CPR by recruiting lay volunteers to nearby OHCAs via their mobile phones. Hypothesis: By dispatching lay volunteers to nearby OHCAs with mobile phone technology bystander CPR may increase from 50% to 62,5 %