The nurse is working with an infant who has trisomy 21 and an atrioventricular septal defect (AVC). The father asks the nurse about the percentage of children with Down syndrome who have atrioventricular septal defects
Which of the following is the nurse's best explanation? a. "Atrioventricular septal defects are very rare in children with Down syndrome because they usually occur without any other congenital anomalies."
b. "About 50% of children with Down syndrome have some congenital heart defect, and many of these are associated with some degree of atrioventricular septal defect."
c. "Less than 3% of children with Down syndrome will have an associated heart defect."
d. "Approximately 90% of the children who are born with Down syndrome have atrioventricular septal defects."
B
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A Incorrect. Fifty percent of children with Down syndrome have some form of congenital heart defect, many of which are atrioventricular septal defects. Therefore, AVCs are not rare in these children.
B Correct. The nurse's best explanation is that about 50% of children with Down syndrome have some congenital heart defect, and many of these are associated with some degree of atrioventricular septal defect.
C Incorrect. About 50% of children with Down syndrome will have an associated heart defect, not less than 3%.
D Incorrect. Approximately 50% of children with Down syndrome have some form of congenital heart defect, many of which are atrioventricular septal defects.
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