Pulmonary valve: Difference between revisions
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The '''pulmonary valve''' | ==Overview== | ||
The '''pulmonary valve''' is the [[heart valves|semilunar valve]] of the heart that lies between the [[right ventricle]] and the [[pulmonary artery]] and has three cusps. | |||
Similar to the [[aortic valve]], the pulmonic valve opens in [[cardiac cycle|ventricular systole]], when the pressure in the [[right ventricle]] rises above the pressure in the [[pulmonary artery]]. At the end of ventricular systole, when the pressure in the [[right ventricle]] falls rapidly, the pressure in the pulmonary artery will close the pulmonic valve. | Similar to the [[aortic valve]], the pulmonic valve opens in [[cardiac cycle|ventricular systole]], when the pressure in the [[right ventricle]] rises above the pressure in the [[pulmonary artery]]. At the end of ventricular systole, when the pressure in the [[right ventricle]] falls rapidly, the pressure in the pulmonary artery will close the pulmonic valve. | ||
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== | ==Related Chapters== | ||
* [[Heart valve]] | * [[Heart valve]] | ||
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{{Heart}} | {{Heart}} | ||
{{Circulatory system pathology}} | {{Circulatory system pathology}} | ||
[[Category:Anatomy]] | [[Category:Anatomy]] | ||
Revision as of 16:07, 5 October 2012
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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]
Synonyms and keywords: Pulmonic valve
Overview
The pulmonary valve is the semilunar valve of the heart that lies between the right ventricle and the pulmonary artery and has three cusps.
Similar to the aortic valve, the pulmonic valve opens in ventricular systole, when the pressure in the right ventricle rises above the pressure in the pulmonary artery. At the end of ventricular systole, when the pressure in the right ventricle falls rapidly, the pressure in the pulmonary artery will close the pulmonic valve.
The closure of the pulmonic valve contributes the P2 component of the second heart sound (S2).
The right heart is a low-pressure system, so the P2 component of the second heart sound is usually softer than the A2 component of the second heart sound. However, it is physiologically normal in some young people to hear both components separated during inhalation.
Normal Anatomy
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Interior of right side of heart.
