mitral valve

American

noun

Anatomy.

the valve between the left atrium and left ventricle of the heart, consisting of two triangular flaps of tissue, that prevents the blood from flowing back into the atrium.

mitral valve British

noun

Also called: bicuspid valve. the valve between the left atrium and the left ventricle of the heart, consisting of two membranous flaps, that prevents regurgitation of blood into the atrium

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

mitral valve Scientific

/ mī′trəl /

A valve of the heart, composed of two triangular flaps, that is located between the left atrium and left ventricle. The mitral valve regulates blood flow between the two chambers.

Etymology

Origin of mitral valve

First recorded in 1685–95

Example Sentences

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See Examples For:

mitral valve

The team reviewed clinical information from more than 9,000 patients who had undergone mitral valve repair or replacement for DMR.

From Science Daily ● Jul. 12, 2026

Each time the heart contracts, the mitral valve should close firmly.

From Science Daily ● Jul. 12, 2026

It is moving into other areas of cardiovascular disease, such as mitral valve replacement and tricuspid valve replacement.

From Barron's ● Sep. 26, 2025

For example, the mitral valve can be repaired with a catheter-based system.

From Science Daily ● Apr. 9, 2024

A similar process occurs on the right side of the heart, but here, instead of a mitral valve of two flaps between auricle and ventricle, we have a tricuspid valve with three.

From Text Book of Biology, Part 1: Vertebrata by Wells, H. G. (Herbert George)

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023