**1.10 Aortic valve**

The aortic valve, thicker and stronger than the pulmonary valve, is composed of three components (i.e, annulus, cusps, and commissures), and consists of three leaflets named for their anatomical relationship to the coronary ostium (**Figure 4**):


There is no coronary artery in the sinus of Valsalva of the Non-coronary leaflet. Three valve edges are where the three leaflets meet each other at the place of attachment to the valve ring. Valve edges may become fused in rheumatic lesions. The aortic valve ring has a circumference of 65–70 mm in adults.
