The most common congenital heart malformation is...

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Multiple Choice

The most common congenital heart malformation is...

The question is testing which congenital heart defect occurs most frequently. Ventricular septal defect is the most common congenital heart malformation. It accounts for the largest share of congenital heart disease overall, with many small VSDs being present at birth or developing early and then closing spontaneously. The defect arises when the interventricular septum doesn’t form completely, most often in the membranous portion, though small defects can be clinically silent and close on their own. In contrast, patent ductus arteriosus is particularly common in premature infants, and aortic stenosis and tricuspid atresia are much less common congenital lesions. That combination makes ventricular septal defect the best answer.

The question is testing which congenital heart defect occurs most frequently. Ventricular septal defect is the most common congenital heart malformation. It accounts for the largest share of congenital heart disease overall, with many small VSDs being present at birth or developing early and then closing spontaneously. The defect arises when the interventricular septum doesn’t form completely, most often in the membranous portion, though small defects can be clinically silent and close on their own.

In contrast, patent ductus arteriosus is particularly common in premature infants, and aortic stenosis and tricuspid atresia are much less common congenital lesions. That combination makes ventricular septal defect the best answer.

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