(rollover to compare with normal)
||What Is It?
In this defect, the outflow tract leading from the heart into the aorta, which carries oxygen-rich blood to the body, is obstructed.
The most common type of Aortic Stenosis, known as valve stenosis, involves a narrowing of the aortic valve (indicated by the arrow in diagram). This may be caused by the aortic valve leaflets being too small or too thick, or the valve may not open properly.
Occasionally, the obstruction does not involve the aortic valve itself but consists of a narrowing of the passage either above (supravalvular) or below it (subvalvular).