Superior vena cava

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Vein: Superior vena cava
Right ventricleLeft ventricleAortic valveMitral valveLeft atriumRight atriumAortaPulmonary valveTricuspid valveInferior vena cavaSuperior vena cavaPulmonary arteryPulmonary veinDiagram of the human heart (cropped).svg
About this image
Anterior (frontal) view of the opened heart. White arrows indicate normal blood flow.
Latin v. cava superior
Gray's subject #172 666
Source brachiocephalic vein, azygous vein
MeSH Vena+Cava,+Superior

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]


Overview

The superior vena cava is a large, yet 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, behind the lower border of the first right costal cartilage. 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.

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See also



eu:Goiko kaba it:Vena cava superiore nl:Vena cava superior sk:Horná dutá žila sr:Горња шупља вена fi:Yläonttolaskimo




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