mitral valve


: a cardiac valve consisting of two triangular flaps which allow only unidirectional blood flow from the left atrium to the left ventricle

called also bicuspid valve

Examples of mitral valve in a Sentence

Recent Examples on the Web In severe cases, mitral valve prolapse could lead to serious complications such as heart attack and stroke, according to the organization. Kimberlee Speakman, Peoplemag, 7 Feb. 2024 The researchers tackled the left side first by focusing on the mitral valve, which controls the flow between the left atrium and ventricle (the heart’s upper and lower chambers). Payal Dhar, Scientific American, 10 Jan. 2024 After Lucky was diagnosed with mitral valve disease, Randle went in search of a vet that could perform the life-saving heart surgery that Lucky needed. Caroline Feller-Howard, ABC News, 17 Nov. 2023 To direct the left ventricle’s high-velocity output into the aorta, the mitral valve must tightly seal off the left atrium. Tony Dajer, Discover Magazine, 18 June 2022 Leakage in the mitral valve had grown severe. Nick Moyle,, 8 Aug. 2020 The mitral valve no longer leaked a small amount; now a jet of blood regurgitated backward into the left atrium with each beat. Anna Reisman, Discover Magazine, 9 July 2011 Rheumatic heart disease, which begins as untreated strep throat, can damage the mitral valve of the heart and ultimately be fatal. Ed Stannard, Hartford Courant, 28 Feb. 2023 The patients underwent 101 procedures, including 59 peripheral arterial procedures (open bypass, endarterectomies, and endovascular procedures) and 42 cardiac procedures (coronary artery bypass graft, transaortic valve replacement, percutaneous coronary intervention, mitral valve replacement). Zach Epstein, BGR, 27 Mar. 2021

These examples are programmatically compiled from various online sources to illustrate current usage of the word 'mitral valve.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

Word History

First Known Use

1696, in the meaning defined above

Time Traveler
The first known use of mitral valve was in 1696

Dictionary Entries Near mitral valve

Cite this Entry

“Mitral valve.” Dictionary, Merriam-Webster, Accessed 22 Apr. 2024.

Medical Definition

mitral valve

: a valve in the heart that guards the opening between the left atrium and the left ventricle, prevents the blood in the ventricle from returning to the atrium, and consists of two triangular flaps attached at their bases to the fibrous ring which surrounds the opening and connected at their margins with the ventricular walls by the chordae tendineae and papillary muscles

called also bicuspid valve, left atrioventricular valve

More from Merriam-Webster on mitral valve

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