<Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> In the developing fetus, the ductus arteriosus, also called the ductus Botalli, is a blood vessel connecting the main pulmonary artery to the proximal descending aorta . It allows most of the blood from the right ventricle to bypass the fetus's fluid - filled non-functioning lungs . Upon closure at birth, it becomes the ligamentum arteriosum . There are two other fetal shunts, the ductus venosus and the foramen ovale . </P> <P> The ductus arteriosus is formed from the left 6th aortic arch during embryonic development and attaches to the final part of the aortic arch (the isthmus of aorta) and the first part of the pulmonary artery </P> <P> Failure of the DA to close after birth results in a condition called patent ductus arteriosus and the generation of a left - to - right shunt . If left uncorrected, patency leads to pulmonary hypertension and possibly congestive heart failure and cardiac arrhythmias . </P>

Where is the ductus arteriosus located in the fetal heart
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