Children's Hospital Colorado

Aortic Valve Stenosis

Aortic stenosis is the inability of the aortic valve to open completely. The aortic valve is located between the left ventricle and aorta and allows for blood to flow out of the left ventricle and prevents blood from leaking backward. At some centers, aortic valve stenosis can be identified by fetal echocardiogram as early as 14 weeks gestation. Mild forms of aortic valve stenosis may only require careful observation. However, when aortic valve stenosis is severe, the left ventricle can become dilated and dysfunctional. In some cases, there may be a reduction in blood flow into the left ventricle which may halt its growth, resulting in a severe form of congenital heart disease called hypoplastic left heart syndrome

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