Heart+Attack+by+YouBin+and+Kay

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=**__WHAT ARE HEART ATTACKS?__ **= ===Heart attacks could be caused by heart diseases, or a result of coronary artery disease (CAD). It is the build up of material called //plaque// in the inner walls of the coronary artery. A heart attack, or myocardial infarction (MI), is permanent damage to the heart muscle.=== ===It can also be caused by usage of drugs and cigarettes. During a heart attack, symptoms such as rapid or irregular heartbeats, can last up to 30 minutes or longer, and cannot be relieved by rest or oral medication.=== =More than //1 million people// die of heart attacks every year.=

Symptoms of a heart attack = =