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What are heart valves?

ANSWER

Heart valves are structures that maintain the proper direction of blood flow. There are four valves in the heart: the tricuspid and the mitral valve, which lie between the atria and ventricles, and the pulmonic and aortic valves, which lie between the ventricles and the blood vessels leaving the heart.

SOURCES:

American Heart Association: "Heart Failure."

Heart Failure Society of America.

Texas Heart Institute.

National Heart Lung and Blood Institute.

Reviewed by Suzanne R. Steinbaum on October 29, 2017

SOURCES:

American Heart Association: "Heart Failure."

Heart Failure Society of America.

Texas Heart Institute.

National Heart Lung and Blood Institute.

Reviewed by Suzanne R. Steinbaum on October 29, 2017

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What is the definition of variant angina?

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