Sudden cardiac death (SCD) is a sudden, unexpected death caused by heart function loss (sudden cardiac arrest- SCA) with most SCDs caused by abnormal heart rhythms called arrhythmias. Ventricular fibrillation is the most common life-threatening arrhythmia, which is an erratic, disorganized firing of impulses from the ventricles (the ticker’s lower chambers). The heart is unable to pump blood when this occurs and death will occur within minutes, if left untreated. In the United States, sudden cardiac death is the largest cause of natural death and is also responsible for half of all heart disease deaths. A victim in the middle of a cardiac arrest would require emergency treatment which includes cardiopulmonary resuscitation (CPR) and defibrillation. CPR procedure combines chest compressions and rescue breaths that keeps enough oxygen in the lungs and gets it to the brain until restoration of normal heart rhythm with an electric shock to the chest (defibrillation). Get trained in