Where does the left superior intercostal vein drain into?

The left superior intercostal vein forms by the union of the 2^nd to 4^th left posterior intercostal veins. It courses superiorly to the left of the midline, arches posteriorly lateral to the aortic arch to drain into the left brachiocephalic vein. It typically communicates with the accessory hemiazygos vein.

How is hemiazygos vein formed?

Origin and course. The accessory hemiazygos vein is formed by the confluence of the middle left posterior intercostal veins. It descends to the left of midline, adjacent to the thoracic vertebrae and crosses posteriorly to the aorta at the level of T7-8 to drain into the azygos vein.

What is the difference between azygos and hemiazygos veins?

Thus, azygos means unpaired. The azygos vein is unpaired in that there is only one in the body, mostly on the right side. While there is the hemiazygos vein and its accessory on the left side of the body, they are considered tributaries of the azygos vein rather than its left-side equivalent.

What level does the superior hemiazygos vein drain into the azygos vein?

Hemiazygos vein

It drains the 9^th to 11^th left posterior intercostal veins and left subcostal vein, alongside some esophageal veins. The hemiazygos vein ascends the thorax to the left of the vertebral bodies and passes behind the esophagus at the level of T9 to join the azygos vein.

Where do the anterior intercostal veins drain?

The anterior intercostal veins originate from the intercostal space just inferior to anterior aspects of their respective ribs and drain into the internal thoracic and musculophrenic veins.

Where does the right inferior phrenic vein drain?

The Inferior Phrenic Veins drain the diaphragm and follow the course of the inferior phrenic arteries. The right ends in the inferior vena cava.

Which vein drains into Hemiazygos?

The hemiazygos vein arises from the left ascending lumbar vein. It drains the lower left posterior intercostal veins and ascends on the vertebral bodies posterolateral to the descending aorta. At T8, it crosses to the right behind the aorta, thoracic duct, and esophagus, and joins the azygos vein.

What is left superior intercostal vein?

The left superior intercostal vein forms by the union of the 2^nd to 4^th left posterior intercostal veins. It courses superiorly to the left of the midline, arches posteriorly lateral to the aortic arch to drain into the left brachiocephalic vein. It typically communicates with the accessory hemiazygos vein.

Where is the intercostal vein?

The intercostal veins are a group of veins which drain the area between the ribs ("costae"), called the intercostal space. Posterior intercost veins that drain into the Superior intercostal vein - 2nd, 3rd, and 4th intercostal spaces. The superior intercostal vein then drains into the Azygous vein.

Where does left gastric vein come from?

The left gastric vein (or coronary vein) is a vein that derives from tributaries draining the lesser curvature of the stomach.

How many brachiocephalic veins are there?

There is no brachiocephalic artery for the left side of the body. The left common carotid, and the left subclavian artery, come directly off the aortic arch. However, there are two brachiocephalic veins.

Do horses have a left azygos vein?

A complete left cranial vena cava (LCVC) was found in a normal horse. ... The azygous vein was normally distributed on the right side of the thoracic vertebral bodies but passed ventral to the aortic arch to empty into the cranial vena cava on the left close to the origin of the aortic arch.

What does superior intercostal vein drain into?

The right superior intercostal vein drains the upper two to three intercostal spaces and can empty into either the azygos or the right brachiocephalic vein. Other tributaries of the azygos vein include esophageal, bronchial, mediastinal, and pericardial veins.

Which blood vessels drain blood from intercostal veins?

The intercostal veins run above the intercostal arteries, which run above the intercostal nerves. The posterior intercostal veins drain into the azygos vein (right side), and hemiazygos and accessory hemiazygos veins (left side). The latter two veins ultimately drain into the azygos vein.

Where is thoracic duct?

The thoracic duct ascends through the aortic hiatus of the diaphragm entering the posterior mediastinum, still to the right of the vertebral column. It courses posterior to the esophagus at the T7 level and crosses over the midline to the left side of the thorax around the T5 vertebral level.

Which vein is formed by the union of the brachial and basilic veins?

The axillary vein is one of the major veins of the upper limb. It is formed by the union of the paired brachial veins and the basilic vein and contributes to the drainage of the axilla, arm and superolateral chest wall.

Which veins drain into the superior vena cava?

The superior vena cava is formed by the left and right brachiocephalic or innominate veins, which receive blood from the upper limbs, eyes and neck, behind the lower border of the first right costal cartilage.