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myocardium

The thick middle layer of the heart wall, made of heart muscle that contracts to pump blood.

my-oh-KAR-dee-um noun

Word parts

What it means

The heart muscle. It lies between the thin inner lining (endocardium) and the outer covering (epicardium). It is thickest in the left ventricleVEN-trih-kulOne of the two lower chambers of the heart, or one of the fluid-filled spaces inside the brain.Full entry , which pumps blood to the whole body. The coronary arteries supply it with blood. When a coronary artery is blocked, part of the myocardium dies, which is a myocardial infarctionmy-oh-KAR-dee-ul in-FARK-shunDeath of part of the heart muscle because its blood supply is blocked; a heart attack.my/o musclecardi/o heart-al having to do withinfarct area of dead tissueFull entry .

At a glance

Spanishmiocardio
Also writtenheart muscle, myocardial

Related terms

myocardial infarction

Death of part of the heart muscle because its blood supply is blocked; a heart attack.

coronary artery

One of the blood vessels on the surface of the heart that bring oxygen-rich blood to the heart muscle.

contractility

The ability of a muscle, especially the heart muscle, to shorten and squeeze with force.

endocarditis

Inflammation of the inner lining of the heart, most often on the heart valves.

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