Unicuspid aortic valve 2014-01-08T08:14:15Z HP:0012561 The aortic valve normally has three cusps (flaps), that is, it is normally tricuspid. Unicuspid aortic valve (UAV) shares many of the features of bicuspid aortic valve, including valvular dysfunction, aortic dilatation, aortic dissection, and dystrophic calcification, although these conditions develop at an earlier age and progress at a faster pace in UAV. UMLS:C0345001 SNOMEDCT_US:253610004 The presence of an aortic valve with one instead of the normal three cusps (flaps). Abnormal aortic valve cusp morphology