Genetics

Genetic risk for atypical heart attack in women identified

New research published by teams from Leicester, UK and Paris, France in collaboration with international partners from the US and Australia, has found a common genetic factor that confers a significant risk of atypical heart ...

Cardiology

Brain health not affected by major heart surgery

Patients who undergo heart surgery do not experience major memory changes—either better or worse—when compared with those who have a much less invasive, catheter-based procedure, according to a study published online ...

Cardiology

Treatment for underdiagnosed cause of debilitating chest pain

Patients who arrive at the hospital with heart-attack-like symptoms have had little recourse for their chest pain if scans came back clear, with no signs of blocked coronary arteries. Some of these cases are caused by a little-known ...

Cardiology

Lower mortality seen for cardiac care at top-ranked hospitals

(HealthDay)—Compared with nonranked hospitals, top-ranked hospitals have lower 30-day mortality but similar or higher readmission rates for cardiovascular conditions, according to a study published online Nov. 28 in JAMA ...

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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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