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Figure 1: Conduit angiogram in the right anterior oblique view (a) showing fenestration in Fontan circuit and a guidewire placed through this fenestration (single arrow). Previously deployed coils in aortopulmonary collaterals, left pulmonary artery stent, and surgical tricuspid annuloplasty ring are seen. The fenestration was restricted (b) with atrial flow regulator device (double arrow). RPA: Right pulmonary artery

Figure 1: Conduit angiogram in the right anterior oblique view (a) showing fenestration in Fontan circuit and a guidewire placed through this fenestration (single arrow). Previously deployed coils in aortopulmonary collaterals, left pulmonary artery stent, and surgical tricuspid annuloplasty ring are seen. The fenestration was restricted (b) with atrial flow regulator device (double arrow). RPA: Right pulmonary artery