Defibrillation is a part of basic life support; it is a life-saving action to enable normal cardiac operation, ending irregular vibrations on myocardium by giving electric current to the heart through defibrillator. Defibrillation applied for 20-30 seconds in VF or VT without a pulse, converts almost 100% of them to sinus rhythm. Each one-minute delay reduces the chance of success by 10%.......