Mitral valve

Mitral valve anatomy

The mitral valve or bicuspid valve is one of the four heart valves and is located between the left ventricle and the left atrium.
The name mitral valve is derived from its appearance. It resembles a bishop's cap (miter) and was therefore named after it.

Figure mitral valve

Figure mitral valve
  1. Mitral valve -
    Valva mitralis
  2. Tricuspid valve -
    Tricuspid valva
  3. Aortic valve -
    Valva aortae
  4. Pulmonary valve -
    Valva trunci pulmonalis
  5. Right atrial -
    Atrium dextrum
  6. Right ventricle -
    Ventriculus dexter
  7. Left atrium -
    Atrium sinistrum
  8. Left ventricle -
    Ventriculus sinister
  9. Papillary muscle -
    Papillary muscle
  10. Superior vena cava -
  11. Superior vena cava
  12. Aortic arch -
    Arcus aortae
  13. Pulmonary artery trunk -
    Pulmonary trunk
    1 + 2 sail flaps
    = Atrial clamp valves
    = Atrioventricular valves
    = AV valves
    3 + 4 pocket flaps

You can find an overview of all Dr-Gumpert images at: medical illustrations

She is one of the Sail flaps and consists of a total of two sails.

This includes:

  • Cuspis anterior, the anterior leaflet
  • Cuspis posterior, the posterior sail

The Mitral valve is in the left ventricle connected with so-called tendon threads on the papillary muscle.

function

The Mitral valve serves as a valve between the left ventricle and the left atrium. When the heart moves blood from the heart into the body and Pulmonary circulation pumped, the valve prevents the backflow of blood from the left ventricle into the left atrium by closing.
After the heart contracts (heart action), it relaxes heart to get back with blood to fill. In order for this to happen, the mitral valve opens, allowing blood to flow from the left atrium towards the left ventricle.
So that Sail flap cannot turn over, its tendon threads make it good at Heart muscle of the left ventricle anchored.

Mitral valve diseases

Mitral valve regurgitation
If the mitral valve no longer closes efficiently, a Mitral valve regurgitation spoken. In this case, blood can flow back into the right ventricle despite the closed heart valve.
More information about the Mitral valve regurgitation can be found under our topic: Mitral valve regurgitation

Mitral valve stenosis
If the opposite happens, i.e. the mitral valve no longer opens, one speaks of one Mitral valve stenosis.
A Mitral valve stenosis can be congenital or acquired. Infections the mitral valve (Endocarditis) or that rheumatic fever can be considered to be the cause of acquired mitral valve stenosis.
You can read more about this under our topic: Mitral valve stenosis

In rare cases there may also be a lack of the Mitral valve come, this is called Mitral atresia. Overall, the mitral valve is more often affected by malformations and heart valve defects than the Tricuspid valve (Aortic valve), which is located in front of the left ventricle of the heart.

Read more about the topic here: Valvular heart disease