Poor journalism as well.
If his heart stops, you WANT the defibrilator to “go off”. It shocks the heart back into rhythm.
Technically, if your heart stops, someone should just perform CPR.
If your heart is in a shockable rhythm such as ventricular fibrillation or pulseless ventricular tachycardia, you can administer a defibrillation shock to stop the heart so that it can restart on its own. Ideally.