1. Sick sinus syndrome is also associated with azygos continuation of interrupted inferior vena cava. 2. The azygos vein transports deoxygenated blood from the posterior walls of the thorax and abdomen into the superior vena cava vein. 3. He blew air into the lower part of the azygos , and showed that the vena cava would not be inflated. 4. To the right is the azygos veins and thoracic duct, and to the left is the left pleura and lung. 5. A tear-drop shaped density noted at the bottom of the fold ( Green arrow ) is the azygos vein. 6. This " arch of the azygos vein " ( " arcus venae azygos " ) is an important anatomic landmark. 7. This " arch of the azygos vein " ( " arcus venae azygos " ) is an important anatomic landmark. 8. HRCT thorax, axial section delineates a well-defined, convex-shaped fold ( Blue arrow ), the azygos fissure. 9. The azygos vein arches over it from behind; and the right pulmonary artery lies at first below and then in front of it. 10. The root of the right lung lies behind the superior vena cava and part of the right atrium, and below the azygos vein. 
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