The four-chamber view appears normal (Line 3). In the longitudinal view of the ductal arch, the pulmonary artery and ductus arteriosus are not visualized. The three-vessels and trachea view (Line 1) is abnormal, and shows only the aorta (arising from the right ventricle) and superior vena cava. After placement of Line 2, the pulmonary artery (confirmed by its bifurcation) is seen exiting the left ventricle. AO, aorta; PA, pulmonary artery; RV, right ventricle; SVC, superior vena cava.