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A heart attack occurs when the blood supply to a portion of the heart muscle is severely reduced or stopped This happens when one of the arteries that supply blood to the heart muscle is blocked by an obstruction This blockage can be due to a condition called atherosclerosis a build up of fatty like substance along the wall of the artery a blood clot or a coronary vessel spasm along with a total obstruction If the blood supply to a portion of the heart stops that area of the heart will no longer receive the oxygen or nutrients needed to carry out its function and will die If it is a very small part of the heart involved it will be able to work without it If a large portion is damaged irreversible damage will happen which can lead to deathDamage to the heart muscle may be so severe that it may cause abnormal heart rhythm called arrhythmias Most people who are of a myocardial infraction or a heart attack do so within a few hours due to a type of arrhythmia The heart attack victim will complain of pressure discomfort or a squeezing sensation in the centre of the chest There may be pain radiating to the arms or the neck There may also be shortness of breath weakness fatigue nausea vomiting and or indigestion The pain that occurs is the result of heart tissue ischemia decreased blood supply The area that is not receiving enough blood is literally crying out for help When a person complains of any of the symptoms mentioned they should be transported to the nearest hospital The diagnosis of an MI is made for the patients history from special tests on ECG and measurement of certain enzymes released into the bloodstream from damaged heart muscleOnce an MI has occurred and a portion of the heart muscle has died something has to be done to prevent a piece of
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