During a regular checkup 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?

a. Atrial septal defect

b. Ventricular septal defect

c. Isolated tricuspid regurgitation

d. Tetralogy of Fallot

e. Mitral valve prolapse

the answer is below…

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