https://wikimd.org/index.php?action=history&feed=atom&title=Heart_valve 2026-04-26T13:52:43Z Revision history for this page on the wiki MediaWiki 1.44.2 https://wikimd.org/index.php?title=Heart_valve&diff=4514058&oldid=prev 2022-08-05T18:21:29Z

<p></p> <p><b>New page</b></p><div>[[File:Pulmonary valve stenosis.svg|Pulmonary_valve_stenosis|thumb]]<br /> Heart valve is the structure at each exit of the four chambers of the [[heart]] that allows blood to exit but not to flow back in.<br /> ==Function==<br /> The valves open and close to control or regulate the blood flowing into the heart and then away from the [[heart]]. <br /> ==Types==<br /> * Three of the heart valves are composed of three leaflets or flaps that work together to open and close to allow blood to flow across the opening. <br /> * The [[mitral valve]] only has two leaflets<br /> ==Pathology==<br /> * Healthy heart valve leaflets are able to fully open and close the valve during the heartbeat, but diseased valves might not fully open and close. <br /> * Any valve in the heart can become diseased, but the [[aortic valve]] is most commonly affected. <br /> * Diseased valves can become “leaky” where they don’t completely close; this is called [[regurgitation]]. <br /> * If the hart valve narrows and causes obstruction to the flow, it is called [[stenosis]].<br /> * If this happens, blood leaks back into the chamber that it came from and not enough blood can be pushed forward through the heart. <br /> {{stub}}<br /> {{Heart anatomy}}<br /> {{Portal bar|Anatomy}}<br /> {{Authority control}}<br /> [[Category:Cardiac anatomy]]<br /> [[Category:Heart valves| ]]</div>

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