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Sudden Cardiac Death, sometimes referred to as Sudden Cardiac Arrest, is a failure in the heart's electrical system in which the heart stops suddenly and without warning. In the US, over 400,000 adults die each year from sudden cardiac arrest. Sudden cardiac arrest differs from a heart attack, also called a myocardial infarction, in that a myocardial infarction results when a part of the heart is starved of oxygen - called ischemia. This happens when a clot or blockage obstructs one of the arteries that supply blood to the heart. Sudden cardiac arrest is caused by life-threatening ventricular arrhythmias. One of the most common arrh

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