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Lateral view showing a pigtail catheter advanced into the pulmonary artery from the aorta via a large patent ductus arteriosus (star mark). Also note the Swan-Ganz catheter that has a course from the right femoral vein to the dilated azygos vein, to the superior vena cava, to the right atrium and finally to the right ventricle (only the catheter course is seen, venogram not available).
