1. No valve divides the superior vena cava from the right atrium. 2. Ideally, the catheter terminates in the superior vena cava or the right atrium. 3. It is located at the junction of the superior vena cava and the right atrium. 4. The presence of the tumor may disrupt the normal upper airway obstruction and superior vena cava syndrome. 5. They can occur near the superior vena cava or inferior vena cava, but the former are more common. 6. For example, when removing the heart, connects such as the superior vena cava and inferior vena cava are separated. 7. A sinus venosus ASD that involves the superior vena cava makes up 2 to 3 % of all interatrial communication. 8. The azygos vein transports deoxygenated blood from the posterior walls of the thorax and abdomen into the superior vena cava vein. 9. In humans they are called the superior vena cava and the inferior vena cava, and both empty into the right atrium. 10. Radiologic evidence suggestive of involvement of the superior vena cava and seminal vesicle has been reported in confirmed cases of IgG4-RD.
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