A normal<unk>  valve has three leafs (it is a tricuspid valve), but some patients are born with a congenital abnormality in which the<unk>  valve has two leaflets (a<unk><unk>  valve).
Bicuspid aortic stenosis
Double orifice mitral valve
Supravalvular aortic stenosis
Subvalvular aortic stenosis
Quadricuspid aortic valve
Quadricuspid pulmonary valve
Pulmonary valve stenosis
Mitral valve sclerosis