The purpose of the shock is to essentially “stun” the heart, disrupting the chaos and allowing it to return to a normal rhythm. Although not all arrhythmias are life-threatening, some can result in cardiac arrest, or the complete cessation of heart pump function.Īfter chest pad placement, the AED analyses the electrical output of the heart for a few seconds to determine whether a shock is needed. Arrythmias can quickly grow to involve entire chambers of the heart, resulting in fibrillations, or disordered, chaotic electrical activity. Arrthymias occur when the heart is still active, but dysfunctioning in a pattern that prevents proper circulation of blood. What is cardiac arrest?ĪEDs are small, portable units that can diagnose and treat cardiac arrhythmias. Conversely, while one could expect to see one cardiac arrest event per year at casinos and racetracks, there were not nearly as many of the life-saving devices at hand. In a study published last year comparing out-of-hospital cardiac events and defibrillator locations, Canadian researchers found something interesting: although schools were relatively low-risk locations for cases of cardiac arrest, nearly 75% of schools had AEDs.
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