What is azygos vein continuation?
Abstract. Interruption of the inferior vena cava (IVC) with azygos continuation is a rare congenital anomaly, in which the IVC is interrupted below the hepatic vein and venous return beyond this point is restored by the dilated azygos and hemiazygos veins draining into the superior vena cava.
Where does azygos vein join?
right superior intercostal vein
The azygos vein receives the lower eight right-sided posterior intercostal veins, as well as the bronchial veins from the right lung. It is joined by the right superior intercostal vein superiorly.
What does the azygos vein connect to?
The azygos vein is a vein running up the right side of the thoracic vertebral column draining itself towards the superior vena cava. It connects the systems of superior vena cava and inferior vena cava and can provide an alternative path for blood to the right atrium when either of the venae cavae is blocked.
Where does the azygos vein end?
superior vena cava
The azygos vein usually arises either from the lumbar azygos vein or from the posterior side of inferior vena cava around the level of renal veins. It passes through the diaphragm, reaches the mediastinum and finally drains into the superior vena cava.
How is azygos vein formed?
The azygos vein is formed by the union of the ascending lumbar veins and right subcostal veins at around the T12-L2 vertebral level.
What is interrupted IVC?
Interrupted inferior vena cava (IVC) is a rare developmental defect characterised by azygos continuation following failure of fusion of one or more of the component parts of the embryological IVC and occurring in approximately one in 5000 of the general population.
What is unique about the azygos vein?
Azygos vein is the vein that drains the venous blood from the upper part of the posterior abdominal wall and the thoracic wall. It is very important for the reason that it connects the superior vena cava with the inferior vena cava, and it has very few to no valves.
What is SVC syndrome?
Superior vena cava syndrome (SVCS) is a group of problems caused when blood flow through the superior vena cava (SVC) is slowed down. The SVC is a large vein that drains blood away from the head, neck, arms, and upper chest and into the heart. SVCS is most often seen in people who have cancer.
What veins form the azygos vein?
What is Hemiazygos vein?
The hemiazygos vein (vena azygos minor inferior) is a vein running superiorly in the lower thoracic region, just to the left side of the vertebral column.
Do horses have a left azygos vein?
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.