Pulmonary valve

anatomy

The pulmonary valve is one of the four valves of the heart and is located between the large pulmonary artery (Pulmonary trunk) and the right main chamber. The pulmonary valve is a pocket valve and usually consists of a total of 3 pocket valves.

This includes:

• Valvula semilunaris dextra, the right crescent-shaped pocket
• Valvula semilunaris sinistrawho have favourited the left crescent shaped pocket
• Valvula semilunaris anteriorwho have favourited Front Crescent Pocket

The pockets have an indentation that fill with blood when the aortic valve is closed. They also all have a small fiber knot that meet when the valve closes. The valve is formed in the fetus in the 5th to 7th week of embryonic development.

Illustration heart

1. Right atrial - Atrium dextrum
2. Right ventricle -
   Ventriculus dexter
3. Left atrium - Atrium sinistrum
4. Left ventricle -
   Ventriculus sinister
5. Aortic arch - Arcus aortae
6. Superior vena cava -V. cava superior
7. Lower vena cava -V. cava inferior
8. Pulmonary artery trunk -
   Pulmonary trunk
9. Left pulmonary veins -
   Vv. Pulmonary sinastrae
10. Right pulmonary veins -
    Vv. Pulmonary dextrae
11. Mitral valve - Valva mitralis
12. Tricuspid valve -
    Tricuspid valva
13. Chamber partition - Interventricular septum
14. Aortic valve - Valva aortae
15. Papillary muscle - M. papillaris
16. Pulmonary valve - Valva trunci pulmonalis

All medical illustrations

function

The pulmonary valve prevents the blood from flowing back into the right ventricle from the pulmonary artery, which carries deoxygenated blood to the lungs. If that heart As the heart contracts, blood is drawn into the right main chamber by pressure large pulmonary artery (Pulmonary trunk) and thus into the lungwhere it is enriched with oxygen. For this to work, the pulmonary valve must open.
Then the heart has to relax again in order to fill up with blood again, if the pulmonary valve did not exist, the pumped blood would flow back. This is why the pulmonary valve closes during this phase, preventing reflux. If the closure of the pulmonary valve no longer works, one speaks of a Pulmonary valve regurgitationSo the blood flows back into the heart. The opposite of that is that Pulmonary valve stenosis, opens the Heart valve too little and it is difficult for the blood to flow from the heart into the pulmonary circulation.
Both diseases lead to an overload of the heart, as more force has to be used to achieve the same discharge as with a healthy valve.