Compression Only CPR Versus Standard CPR in Out-Of-Hospital Cardiac Arrest - A Randomized Survival Study

"Instructions by dispatcher to bystander to provide CPR with chest-compressions only~The instructions from the dispatcher in interventional arm include:~* An ambulance is dispatched and is on it´s way to you~* Do CPR with chest compressions only~* Push hard on the chest with a pace of 100/minute without interruptions for rescue breathing."

"Instructions by dispatcher to bystander to provide CPR with chest-compressions and rescue breaths in a ration of 30:2~The Instructions from the dispatcher in the control arm include:~* An ambulance is dispatched and is on it´s way to you~* Do CPR with chest compressions and rescue breathing~* Push hard on the chest 30 times and give 2 rescue breaths. The pace of the compressions should be 100/minute."