SCA is the leading cause of death in the western world. Each year almost 30,000 people die in Australia from SCA. It strikes suddenly and without warning. A victim of Sudden Cardiac Arrest (SCA) collapses immediately, as the heart beats chaotically (fibrillates) unable to pump blood through the body. The only hope of survival is access to a defibrillator within minutes, combined with CPR. For every minute of delay there is 10% less chance of survival.