Pulmonary valve

Pulmonary valve

Infobox Anatomy
Name = PAGENAME
Latin = valva trunci pulmonalis
GraySubject = 138
GrayPage = 532


Caption = Anterior (frontal) view of the opened heart. White arrows indicate normal blood flow.


Caption2 = Heart seen from above.
Width = 300 | System =
MeshName = Pulmonary+Valve
MeshNumber = A07.541.510.738
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.


=Additional

ee also

* Heart valve

External links

*


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