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

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

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

The clipping device used is similar to a successful one used to treat patients with damage to another part of the heart, the mitral valve.

From New York Times • Mar. 4, 2023

The mitral valve separates the left ventricle from the left atrium.

From Textbooks • Jun. 9, 2022

I have grave doubts as to my mitral valve, if you would be so very good.

From The Sign of the Four by Doyle, Arthur Conan, Sir

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