The aortic valve is normally tricuspid and is composed of three basic components .The valve is a composite of three u – shaped solid caliginous structures and is in fibrous continuity with the anterior leaflet of the mitral valve and with the membranous septum .(116)
Types of aortic valves
Unicuspid aortic valves are separated pathologically into two types: a commissural and unicommissural ,both a commissural and unicommissural unicuspid valves are generally stenotic . Unicuspid valves may be close completely during diastole as a result of leaflet redundancy or regurgitation .(118)
The bicuspid aortic valve
The bicuspid aortic valve is the most common congenital cardiac anomaly . Bicuspid valves have two primary orientations , one cuspid is positioned anteriorly and the second is positioned posteriorly .
Tricuspid aortic valve
Tricuspid aortic valves generally appear symmetric to the naked eye, variation in cusp size leads to asymmetric closure .
Quadcuspid aortic valve
The presence of four cusps is compatible with normal aortic valve function . Quadcuspid valves are rarely associated with other congenital cardiac anomalies , with the exception of truncus arteriosis .(119)