of cardiac arrests occur at home.?Many victims appear healthy with no known heart disease or other risk factors.?Sudden cardiac arrest is not the same as a heart attack. ?Sudden cardiac arrest occurs when electrical impulses in the heart e rapid or chaotic, which causes the heart to suddenly stop beating.?A heart attack occurs when the blood supply to part of the heart muscle is blocked. A heart attack may cause cardiac arrest.РWHY LEARN CPR?РCPR & Sudden Cardiac Arrest (SCA) Fact Sheet?//WhatisCPR/CPRFactsandStats/CPR-Statistics_UCM_307542_Article.jspРImpact of dispatcher-assisted cardiopulmonary resuscitation (CPR) on performance of bystander CPR rates in (A) Detroit, Michigan (n=684); (B) the Kanto region of Japan (n=1151); and (C) Seattle/King County, Washington (n=404).РWHY TEACH CPR?