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The superior vena cava is a large but short vein that carries de-oxygenated blood from the upper half of the body to the heart's right atrium. It is formed by the left and right brachiocephalic veins (also referred to as the innominate veins) which receive blood from the upper limbs and the head and neck. The azygous vein (which receives blood from the rib cage) joins it just before it enters the right atrium, at the upper right front portion of the heart.
In the adult, no valve separates the superior vena cava from the right atrium. As a result, the (right) atrial and (right) ventricular contractions are conducted up into the internal jugular vein and, through the sternocleidomastoid muscle, can be seen as the jugular venous pressure. In tricuspid valve regurgitation these pulsations are very strong.
Superior vena cava
See also
| | Name | PAGENAME | | Latin | v. cava superior | | Graysubject | 172 | | Graypage | 666 | | Caption | Anterior (frontal) view of the opened heart. ... | | Image2 | Gray577.png | | Caption2 | The brachiocephalic veins, superior vena cava... | | Meshname | Vena+Cava,+Superior | | Meshnumber | A07.231.908.949.815 |
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