News tagged with coronary artery

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

Getting enough sleep really isn't optional

The typical adult needs 7 to 7 1/2 hours of sleep each night, while for teenagers and young adults under 25 about 9 to 10 hours of sleep per night is recommended, says Ann Romaker, MD, director of the University ...

Mar 04, 2015
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Eight ways zinc affects the human body

Researchers identified zinc as one of the most important essential trace metals in human nutrition and lifestyle in a new review article in Comprehensive Reviews in Food Science and Food Safety, published by the Institute ...

Jul 21, 2014
popularity 4.6 / 5 (5) | comments 0

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