Key Difference: Cardiac Arrest is a heart condition where the heart does not contract properly, thereby failing to effectively circulate blood to the other organs.
Nearly all of the interventions that were previously recommended—such as defibrillation and intravenous atropine—are no longer in routine use by the major international bodies.
Since this shock is an immune system response to a given allergen, such as an insect sting or consumption of certain foods, high-dose epinephrine remains a strong measure to drive the cause of arrest for such instances—obstruction of the airway due to allergen response—into retreat.