Your muscle of heart needs d’ oxygenate to survive. A coronary attack (heart attack) occurs when l’ flow of blood which brings l’ oxygenate with the muscle of heart severely is reduced or completely cut out. This occurs because the coronary arteries which provide the heart blood can slowly become more deeply and harder d’ a preparing of grease, cholesterol and d’ other substances which together s’ call the plate. This slow process is known like athérosclérose. When a plate in an artery of heart breaks, a clot of blood forms around the plate. This clot of blood can block l’ artery and to cut l’ flow of blood to the muscle of heart. When the muscle of heart is famished for l’ oxygenate and food, this s’ call l’ ischaemia. When damage or d’ death; part of the muscle of heart occur because of l’ ischaemia, this s’ call a heart attack or a myocardial infarction (SEMI).