Congenital aortic stenosis in X-ray

In Supravalvular aortic stenosis you can see Aortic knob is often small due to underdevelopment and stenosis of the supravalvular portion of the aorta. Different from the poststenotic aortic dilation that occurs with valvular aortic stenosis.

Congenital aortic stenosis. Small aortic arch with moderate enlargement of the left ventricle.