A larger opening can be closed surgically. Atrial septal defect is an opening between the upper heart chambers. It occurs most commonly in girls and in infants with Down's syndrome. There may be no symptoms. It is corrected surgically between the ages of three and five years.
Aortic stenosis is a narrowing of the valve through which blood leaves the heart.
Mild cases may cause only a heart murmur. Surgery to widen the valve is necessary only in severe stenosis. Most congenital heart defects are detected at birth or during a routine examination. However, if you are concerned about your child's growth rate or physical stamina, share your concerns with your child's healthcare provider.