That of the left lung passes beneath the aortic arch and in front of the descending aorta; the phrenic nerve, pericardiacophrenic artery and vein, and the anterior pulmonary plexus, lie in front of each, and the vagus nerve and posterior pulmonary plexus lie behind.
32.
The aberrant right subclavian artery frequently arises from a dilated segment of the proximal descending aorta, the so-called Diverticulum of Kommerell ( which was named for the German Radiologist, Burckhard Friedrich Kommerell ( 1901 & ndash; 1990 ), who discovered it in 1936 ).
33.
In the above example, if the aortic dissection extended from proximal to the left subclavian artery takeoff to the mid descending aorta, the common iliac arteries would be perfused from the true lumen distal to the dissection but would be at risk for malperfusion due to occlusion of the true lumen of the aorta by the false lumen.
34.
There are two types of FAD; groups A and B . Normally if any area of the ascending aorta is involved in the dissection this is considered group A . If the dissection occurs within the descending aorta this is classified in group B . These two groups can than be broken down into three classes of FAD : Type 1, Type 2 and Type 3.
