Pulmonary valve
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Pulmonary valves
)Pulmonary valve | |
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Details | |
Identifiers | |
Latin | valva trunci pulmonalis |
MeSH | D011664 |
TA98 | A12.1.02.010 |
TA2 | 4008 |
FMA | 7246 |
Anatomical terminology |
The pulmonary valve (sometimes referred to as the pulmonic valve) is a valve of the
semilunar valves, the other being the aortic valve. Similar to the aortic valve,[1] the pulmonary 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 closes the pulmonary valve.
The closure of the pulmonary valve contributes to the P2 component of the
second heart sound (S2).[2]
Structure
The pulmonary orifice lies nearly in the horizontal plane, and is situated at a superior level than the aortic orifice.[3]
Cusps
At the apex of the
pulmonary trunk.[citation needed] The cusps are named according to their positions during foetal development: the anterior, the posterior, and the septal cusp.[3] The free edge of each cusp presents a fibrous nodule of semilunar cusp at the centre with two lateral thin portions, the lunule of semilunar cusp. Each cusp forms pocket like dilatation called pulmonary sinus at the initial portion of pulmonary trunk.[citation needed
]
Clinical significance
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.[citation needed]
See also
Additional images
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Interior of right side of heart.
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Pulmonary valves
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Pulmonary valves
References
- PMID 15302062.
- PMID 1117589. Retrieved 4 December 2022.
- ^ ISBN 978-0-7295-3752-0.
External links
Wikimedia Commons has media related to Pulmonary valve.
- Anatomy figure: 20:07-00 at Human Anatomy Online, SUNY Downstate Medical Center
- Adult Congenital Surgery: Pulmonary Valve Replacement