Bring Anatomy to life
The commissural leaflets are small leaflets located at the angles of the mitral valve, where the anterior leaflet intersects with the posterior leaflet. When the valve is closed, the commissural leaflets of the anterior and posterior leaflets meet, preventing the backward flow of blood from the left ventricle to the left atrium.
The posterior leaflet of the left atrioventricular valve is the smaller leaflet of the left atrioventricular valve, which is located behind and to the left of the left atrioventricular orifice, is usually divided into three sections or “scallops” known as P1, P2, and P3. Although somewhat subjective, these divisions aid surgeons in describing the different regions of the leaflet.
It is the larger leaflet of the left atrioventricular valve, located between the atrioventricular and aortic orifices. For descriptive purposes in surgical practice, this leaflet is typically divided into three sections: A1, A2, and A3.
Thie left atrioventricular orifice is the opening that the left atrioventricular valve covers. It’s the passageway through which blood flows from the left atrium to the left ventricle.
The left atrioventricular valve is another name for the mitral valve. It is called the “atrioventricular” valve because it connects an atrium and a ventricle. It has 2 main leaflets Anterior leaflet and a posterior leaflet. The terminology of “anterior” and “posterior” is more of a convention in describing the valve, as the actual spatial positioning of the leaflets isn’t strictly anterior or posterior.