The ligamentum arteriosum is a small ligament between the pulmonary artery and aortic trunk. It is a nonfunctional vestige of the ductus arteriosus, and is formed within three weeks of birth. A ligament is a short band of tough fibrous connective tissue composed mainly of long, stringy collagen fibres. ... The pulmonary arteries carry blood from the heart to the lungs. ... The largest artery in the human body, the aorta originates from the left ventricle of the heart and brings oxygenated blood to all parts of the body in the systemic circulation. ... In the developing fetus, the ductus arteriosus (DA) is a shunt connecting the pulmonary artery to the aortic arch that allows much of the blood from the right ventricle to bypass the fetus fluid-filled lungs. ... Childbirth (also called labour, birth, partus or parturition) is the culmination of a human pregnancy with the emergence of a newborn infant from its mothers uterus. ...
Below are the bifurcation of the pulmonary artery, the left bronchus, the ligamentumarteriosum, the superficial part of the cardiac plexus, and the left recurrent nerve.
As already stated, the ligamentumarteriosum connects the commencement of the left pulmonary artery to the aortic arch.
According to Bonnet 96 this coarctation is never found in the fetus or at birth, and is due to an abnormal extension of the peculiar tissue of the ductus into the aortic wall, which gives rise to a simultaneous stenosis of both vessels as it contracts after birth—the ductus is usually obliterated in these cases.
The ring was released by dividing the ligamentumarteriosum and aberrant retroesophageal left subclavian artery.
Dividing the ligamentumarteriosum and the retroesophageal left subclavian artery is enough in most of the cases to release the compression of the vascular ring.
The division of the ligamentumarteriosum, left subclavian artery and resection of the Kommerell diverticulum as well as anostomosing the left subclavian artery to left common carotis artery or descending aorta can be performed properly.
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