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A: A slightly modified parasternal short axis view obtained by rotating the transducer in counterclockwise direction by 20 degrees. This figure depicts two cardinal features of the inferior sinus venosus defect by echocardiogram: 1) absent posterior rim and 2) straddling of the IVC over the defect. B: By color Doppler interrogation, the straddling of the IVC is confirmed. The flow returning from the IVC splits into two components, one entering the LA and the other entering the RA.
