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The heart is one of the largest muscles of the body. The wall of the heart, called the myocardium, is actually the muscle that circulates the blood by making the pumping. During a heart attack, blockage of an artery Deprive the muscle of oxygenated blood. When the oxygen deficiency becomes severe enough to cause the death of many cells, it is a heart attack. In the medical context, a heart attack is designated acute myocardial infarction (MI).

Heart attack is directly responsible for approximately 11% of all deaths occurring in Canada every year. This figure represents 50% of all deaths attributable to coronary heart disease. Although heart attack is a very serious condition, the chances of survival increase dramatically if you can go to a hospital immediately.