Reduction of the incidence of cardiac arrest and sudden death is a major concern of the American Heart Association and the American Red Cross. The only chance for survival for many who have unexpected cardiac arrest is successful implementation of emergency cardiac care and cardiopulmonary resuscitation (CPR). The majority of victims of cardiac arrest suffer from ventricular fibrillation, and most have severe coronary artery disease. Either the periodic impulses that trigger the coordinated heart muscle contractions cease or ventricular fibrillation or flutter occurs in which the individual muscle fibers have a rapid irregular twitching. Cardiac arrest sudden and often unexpected stoppage of effective heart action.
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