A Heart That Has Stopped Beating Can Be Restarted with a Defibrillator
Contrary to popular belief, you cannot restart a heart with a defibrillator if it has already stopped beating — no matter how much electricity is used.

Fibrillation is the term for an irregular heartbeat due to a sudden cardiac arrest. To help the heart regain its normal rhythm, electric shocks are administered by using a defibrillator. AEDs (Automatic External Defibrillators) scan the heart’s electrical rhythm and administer a shock if any irregularities in the beat are noticed. While this device can be vital, it becomes useless when the heartbeat stops completely.