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The mitral valve is located between the left atrium (LA) and left ventricle (LV). When oxygenated blood comes from the lungs into the LA, it goes from the LA to the LV (diastole). When the LV contracts (systole), it pumps the blood from the LV to the aorta for circulation throughout the body. The mitral valve prevents blood from going up to the LA when the LV contracts, because all the blood should go to the aorta, not back up to where it came from (LA). The mitral valve shuts when the LV contracts, and reopens when the LV relaxes, to allow for filling of the LV again. In short... the mitral valve prevents blood from going up from the LV to the LA during ventricular contraction.

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Q: What does mitral valve do?
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What is the medical term meaning backflow of blood through the mitral valve?

The medical term for backflow of blood through the mitral valve is mitral regurgitation.


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Heart attacks that damage the structures that support the mitral valve are a common cause of mitral valve insufficiency. Myxomatous degeneration can cause a "floppy" mitral valve that leaks.


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The bicuspid valve is also known as the mitral valve or the left atrioventricular valve.


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Mitral stenosis is the medical term meaning narrowing of the mitral valve.


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Twice as many women as men are affected by mitral valve stenosis. About 60% of patients with mitral valve stenosis have had rheumatic fever.


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The Mitral valve.