Venous Drainage Anomalies

Front 1

Double Inferior Vena Cava

Back 1

Failue of left sacrocardinal vein to lose its connection with the left subcardinal vein

Front 2

Absence of IVC

Back 2

Failure of right subcardinal vein to make connection with the liver
Causes shunting of blood into right supracardinal
In adult causes venous return to the heart to go into azygous vein to SVC

Front 3

Left Superior Vena Cava

Back 3

Persistance of left anterior cardinal vein
obliteration of common cardinal and and proximal anterior cardinal on the right

Front 4

Double SVC

Back 4

Absence of anastamosis between anterior cardinal veins

Front 5

Abnormalities of Great Arteries

Back 5

1)patent ductus arteriosus
2)Retroesophageal subclavian
3)Coarctation of Aorta

Front 6

Patent Ductus Arteriosus

Back 6

more frequent in females than in males
causes shunting of blood into pulmonary artery
associated with maternal rubella infection
common in premature infants due to hypoxia

Front 7

Retroesophageal Subclavian

Back 7

Right subclavian arising form the descending aorta
passes posterior to trachea and esophagus
occurs when the 4th aortic arch and right dorsal aorta disapper cranial to dorsal aorta

Front 8

Coarctaion of Aorta
Pre-ductal vs. Post-ductal

Back 8

pre ductal-ductus arteriosus persisits
psot-ductal- ductus is obliterated, collateral circulation is established

Front 9

Coarctation of Aorta

Back 9

constricitions of the aorta near the insertion of ductus arteriosus.