A 15-year-old female presented with fatigue and dyspnea on exertion due to a residual left-to-right shunt across an aortopulmonary window that had been surgically closed 11 years earlier. The residual opening was located distal to the coronary ostia, the semilunar valves, and the pulmonary artery bifurcation. An Amplatzer septal occluder was used to completely close the residual defect, thereby avoiding reoperation.
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