Simply the only proved cure for victims of ventricular fibrillation and ventricular tachycardia at the moment of sudden cardiac arrest is “defibrillation”. Defibrillation device is required for defibrillation application. Defibrillation’s Time/Success statistics for turning cardiac rhythm to normal. As you can see in the figure, the chance to survive decreases with each minute passing. After 10th minute, a chance to survive is close to 0 according to the studies