The heart attack is an urgent signal that the heart has not enough oxygen supplied. The blood vessel shall be blocked by thrombus and if the supply of blood with plenty oxygen has stopped, myocardium shall be broken and symptom of heart attack shall be happen. Thus the patient shall be evacuated to a hospital immediately. At this time, the use of auto AED and CPR (Cardio Pulmonary Resuscitation) only help to increased survival ratio.
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