Cardiology

Statins can save lives, are they being used?

People who have coronary artery disease, stroke or peripheral artery disease often are prescribed a statin, a cholesterol-lowering drug that reduces the risk of heart attack or stroke.

Diseases, Conditions, Syndromes

Symptoms in cold weather predict morbidity and mortality

Heart and respiratory symptoms caused by cold weather predict higher morbidity and mortality. The researchers were surprised to find that symptoms related to cold weather increased morbidity and mortality in healthy individuals. ...

Cardiology

Minorities benefit less from regionalizing heart attack care

California's Black and Hispanic communities may be falling further behind whites in the quality of care they receive for heart attacks, despite recent medical efforts aimed at improving the standards of care for these populations, ...

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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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