The superior vena cava vessel is highlighted.
The superior vena cava (SVC) is the superior portion of the two vena cava, the great vena cava that carries deoxygenated blood from the systemic circulation back to the right atrium of the heart. This is a short vein with a large diameter (24 mm) that receives a venous return from the upper half of the body, above the diaphragm.
The superior vena cava returns from the lower half, below the diaphragm, through the inferior vena cava. The SVC is located in the right anterior mediastinum. [1] This is the typical location for central venous access through a central venous catheter or a central catheter inserted peripherally. Mentions of "la cava" without any other specification usually refer to SVC.
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