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Fig. 5A —Unexpected desaturation after Fontan procedure in 33-year-old
woman. At catheterization, there was distortion of external conduit by
mediastinal mass. Echocardiography (not shown) showed that mass was
fluid-filled. IV contrast-enhanced MDCT was performed to better understand
nature of mediastinal mass and its relationship to external conduit. From this
coronal multiplanar reconstruction (MPR), conduit (C) from inferior vena cava
and hepatic veins to right pulmonary artery is well visualized and is
surrounded by fluid collection (F). V = left ventricle, AO = aorta.