Factual error: The heart cannot be restarted using a defibrillator, in fact, a defibrillator stops a fibrillating heart. The only way to restart it is chest compression.
Suggested correction: CPR cannot restart a heart. See below: "BE AWARE Cardiopulmonary resuscitation (CPR) will not restart a heart in sudden cardiac arrest. CPR is just a temporary measure used to continue a minimal supply of oxygen to the brain and other organs. When someone is in sudden cardiac arrest, defibrillation is the only way to re-establish a regular heartbeat." From https://www.aedauthority.com/cardiac-arrest/.
Just to be clear, "sudden cardiac arrest" occurs when the heart fibrillates, which is not the same as a stopped heart.