Cardiology

PCI, CABG for left main CAD have similar five-year outcomes

(HealthDay)—Five-year rates of a composite outcome of death, stroke, and myocardial infarction are similar for patients with left main coronary artery disease following either percutaneous coronary intervention (PCI) or ...

Cardiology

New findings enable more heart donations

There is a risk of every fourth heart examined for possible donation being dismissed as unusable due to stress-induced heart failure. But this condition, according to new research, has no bearing on the outcome of a transplant. ...

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