These conditions are not common in the United States. Superior vena cava (SVC) obstruction can occur if a blockage occurs in the chest, preventing blood from flowing through the SVC. This could be ...

Medically reviewed by Jeffrey S. Lander, MD The inferior vena cava (also known as IVC or the posterior vena cava) is a large vein that carries oxygen-depleted blood from the torso and lower body to ...