Cardiology

Neural network diagnoses heart disease

A deep neural network can be used to classify coronary artery disease from clinical heart disease features, according to new work published in the International Journal of Dynamical Systems and Differential Equations.

Cardiology

How does diabetes affect the heart?

DEAR MAYO CLINIC: I am 42 and recently was diagnosed with diabetes. My doctor said I could manage the condition with diet and exercise for now but suggested I follow up with a cardiologist. As far as I know, my heart is fine. ...

Medications

NSAID improves vascular health in adults with severe depression

Science has long established a link between depression and cardiovascular disease, but the precise nature of the connection is less clear. In a new proof-of-concept study, researchers worked to zero in on the mechanism behind ...

Cardiology

Relative risk for CVT up after AZD1222 COVID-19 vaccine

The relative rates of hospital contacts for coagulation disorder and cerebrovascular disease are increased after AZD1222 COVID-19 vaccination, particularly for thrombocytopenia and cerebral venous thrombosis, according to ...

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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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