News tagged with coronary artery

Related topics: coronary artery disease · heart attack · patients · heart disease · heart

Struggles with sleep may affect heart disease risk

Are you getting enough quality sleep? Are you sleeping longer than you should? Poor sleep habits may put you at higher risk for early signs of heart disease when compared to those who get adequate, good quality sleep, according ...

Sep 10, 2015
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Long sleep and high blood copper levels go hand in hand

Persons sleeping less than 6 hours or more than 10 hours suffer from low-grade inflammation more often than persons sleeping 7-8 hours per night. This was observed in a University of Eastern Finland study focusing on the ...

Sep 14, 2015
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Coronary circulation

Coronary circulation is the circulation of blood in the blood vessels of the heart muscle. Although blood fills the chambers of the heart, the muscle tissue of the heart (the myocardium) is so thick that it requires coronary blood vessels to deliver blood deep into it. The vessels that deliver oxygen-rich blood to the myocardium are known as coronary arteries. The vessels that remove the deoxygenated blood from the heart muscle are known as coronary veins.

The coronary arteries that run on the surface of the heart are called epicardial coronary arteries. These arteries, when healthy, are capable of autoregulation to maintain coronary blood flow at levels appropriate to the needs of the heart muscle. These relatively narrow vessels are commonly affected by atherosclerosis and can become blocked, causing angina or a heart attack. (See also: circulatory system.) The coronary arteries that run deep within the myocardium are referred to as subendocardial.

The coronary arteries are classified as "end circulation", since they represent the only source of blood supply to the myocardium: there is very little redundant blood supply, which is why blockage of these vessels can be so critical.

This text uses material from Wikipedia, licensed under CC BY-SA

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