Coronary occlusion
Encyclopedia
A coronary occlusion is the partial or complete obstruction of blood flow in a coronary artery. This condition may cause a heart attack
Myocardial infarction
Myocardial infarction or acute myocardial infarction , commonly known as a heart attack, results from the interruption of blood supply to a part of the heart, causing heart cells to die...

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In some patients coronary occlusion causes only mild pain, tightness or vague discomfort which may be ignored: the myocardium is however damaged.
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