Yes: If the valvular abnormalities are present from birth, then they are birth defects.
Answered 6/4/2011
6.5k views
Yes: Children's heart valve abnormalities are classified as birth defects if the abnormalities were present at birth, which is the usual case. A person can get a heart valve defect later, such as due to infection or trauma.
Answered 6/4/2011
6.5k views
Some: A bicuspid aortic valve or a prolapsing mitral valve are present from birth. Many other heart valve abnormalities are acquired, either through scarring from infection, calcium deposition, or mal-apposition due to dilatation of cardiac chambers, among other things.
Answered 8/14/2013
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