Coronary occlusion

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A coronary occlusion is the partial or complete obstruction of blood flow in a coronary artery. This condition may cause a heart attack.

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

According to the Nicholas and Alexandra book, Tsar Nicholas II of Russia suffered a coronary occlusion right before he was toppled from his throne during the Russian Revolution in 1917.