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5225 Pediatrics

During a regular check-up of an 8-year-old child, you note a loud first heart sound with a fixed and widely split-second heart sound at the upper left sternal border that does not change with respirations. The patient is otherwise active and healthy. Which of the following heart lesions most likely explains these findings?

AAtrial septal defect (ASD)
BVentricular septal defect (VSD)
CIsolated tricuspid regurgitation
DTetralogy of Fallot
Pediatrics
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