Pages tagged: congenital heart defect

They happen when the heart does not develop normally before birth. About 1% of infants are born with one or...

The heart’s lower-right chamber (the right ventricle) and lower-left chamber (the left ventricle) are divided by a wall called the...

The word “atresia” means “no opening.” In tricuspid atresia, the valve is missing between the upper-right chamber (the right atrium)...