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Superior vena cava

Vena cava superior

A short, wide vessel approximately 7 cm long, formed by the junction of the right and left brachiocephalic veins posterior to the first right costal cartilage. It descends through the superior mediastinum, receiving the azygos vein, and empties into the right atrium.

On this page
유형 Vessel
신체 계통 Cardiovascular
신체 부위 Heart Region
라틴어 명칭 Vena cava superior
FMA ID 4720

기능

Returns deoxygenated blood from the head, neck, upper limbs, and thorax to the right atrium of the heart. Formed by the confluence of the right and left brachiocephalic veins.

임상적 의의

Superior vena cava syndrome results from compression or obstruction (often by lung cancer or lymphoma), causing facial and upper limb swelling. Central venous catheters are placed via the subclavian or internal jugular veins into the SVC.

Frequently Asked Questions

What is the superior vena cava?

The superior vena cava (SVC) is a short, wide venous vessel approximately 7 cm long that returns deoxygenated blood from the upper half of the body—including the head, neck, arms, and thorax—to the right atrium of the heart.

Where is the superior vena cava located?

The superior vena cava is formed by the junction of the right and left brachiocephalic veins posterior to the first right costal cartilage. It descends through the superior mediastinum before emptying into the right atrium.

What is the function of the superior vena cava?

The superior vena cava collects deoxygenated blood from the upper body, receiving the azygos vein along its course, and returns this blood to the right atrium for subsequent pulmonary circulation.

What conditions may be associated with the superior vena cava?

Superior vena cava syndrome may be associated with obstruction of the SVC, often involving mediastinal masses or thrombosis, leading to venous congestion of the head, neck, and upper limbs. Central venous catheters placed in this region are also a recognized consideration.

What does the superior vena cava look like?

The superior vena cava is a short, wide, thin-walled vessel visible on cross-sectional imaging as a rounded structure in the right superior mediastinum. It is wider than most veins, reflecting the large volume of blood it carries from the upper body.

References

  1. Foundational Model of Anatomy — FMA:4720 Reference anatomy ontology (University of Washington)
  2. Wikipedia — Superior vena cava Encyclopedia article (verified cross-reference)

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Educational Disclaimer

This content is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider for medical decisions.

Data sources: Terminologia Anatomica, Foundational Model of Anatomy, Wikidata.