intercostal vein


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intercostal vein

Any of the veins that accompany the intercostal arteries and drain blood from the walls of the chest. The upper intercostal vein empties into the ipsilateral brachiocephalic or vertebral vein. Intercostal veins 2-4 merge to form the superior intercostal vein, which drains into the azygos vein on the right and the accessory hemiazygos vein on the left. Lower intercostal veins drain directly into the azygos vein on the right and the hemiazygos vein on the left.
Synonym: posterior intercostal vein
See also: vein
References in periodicals archive ?
All the right posterior intercostal veins are traced to the site of their termination into the azygos vein.
It is accompanied by two satellite veins that establish anastomosis between them, forming a single vein that communicates with the intercostal veins of the sixth intercostal space.

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