These chest X rays taken during a barium swallow show right ventricular enlargement, a large pulmonary trunk, pulmonary venous congestion and a left aortic arch.
The PA view demonstrates dilation of the pulmonary trunk manifested by the convex density below the aortic knob. Pulmonary venous congestion is suggested by prominent, fine vascular markings seen in the upper lung fields. The left aortic arch is indicated by deviation of the tracheal air shadow to the right and presence of the aortic knob at the upper left mediastinal border. In the lateral view, right ventricular enlargement is demonstrated by loss of the retrosternal air space.