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A coronary occlusion is the partial or complete obstruction of blood flow in a
coronary artery The coronary arteries are the arterial blood vessels of coronary circulation, which transport oxygenated blood to the heart muscle. The heart requires a continuous supply of oxygen to function and survive, much like any other tissue or organ of ...
. This condition may cause a
heart attack A myocardial infarction (MI), commonly known as a heart attack, occurs when blood flow decreases or stops to the coronary artery of the heart, causing damage to the heart muscle. The most common symptom is chest pain or discomfort which may ...
. In some patients coronary occlusion causes only mild pain, tightness or vague discomfort which may be ignored; however, the
myocardium Cardiac muscle (also called heart muscle, myocardium, cardiomyocytes and cardiac myocytes) is one of three types of vertebrate muscle tissues, with the other two being skeletal muscle and smooth muscle. It is an involuntary, striated muscle t ...
, the muscle tissue of the heart, may be damaged.


In history

According to Robert K. Massie's '' Nicholas and Alexandra: The Fall of the Romanov Dynasty'',
Tsar Nicholas II Nicholas II or Nikolai II Alexandrovich Romanov; spelled in pre-revolutionary script. ( 186817 July 1918), known in the Russian Orthodox Church as Saint Nicholas the Passion-Bearer,. was the last Emperor of Russia, King of Congress Pola ...
may have suffered a coronary occlusion right before he was toppled from his throne during the Russian Revolution in 1917. Massie, Robert K. (2012), '' Nicholas and Alexandra: The Fall of the Romanov Dynasty''. New York, The Modern Library, p. 433. . Accessed 2016-11-19. Originally published in 1967 by Artheneum (United States) as ''Nicholas and Alexandra: An Intimate Account of the Last of the Romanovs and the Fall of Imperial Russia''. .


See also

*
Arterial embolism Arterial embolism is a sudden interruption of blood flow to an organ or body part due to an embolus adhering to the wall of an artery blocking the flow of blood, the major type of embolus being a blood clot ( thromboembolism). Sometimes, pulmon ...


References

Heart diseases {{circulatory-disease-stub