Cardiology

Researchers provide novel insights into primate arterial aging

Cardiovascular disorders are leading causes of morbidity and death worldwide. Age-associated changes in arterial properties, such as endothelial dysfunction and structural alterations, are considered to be initial events ...

Cardiology

Diastolic dysfunction more dangerous than previously thought

Sudden cardiac death is a common cause of death in patients with reduced systolic ejection function. As part of a long-term observational study, MedUni Vienna researchers from the Division of Cardiology have now shown the ...

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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.

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