where is the ductus arteriosus located in the fetal heart
Ductus arteriosus The ductus arteriosus is formed from the left 6th aortic arch during embryonic development[1] and attaches to the final part of the aortic arch (the isthmus of aorta) and the first part of the pulmonary artery[2]
Coronary circulation Coronary arteries supply blood to the myocardium and other components of the heart. Two coronary arteries originate from the left side of the heart at the beginning (root) of the aorta, just after the aorta exits the left ventricle. There are three aortic sinuses (dilations) in the wall of the aorta just superior to the aortic semilunar valve. Two of these, the left posterior aortic sinus and anterior aortic sinus, give rise to the left and right coronary arteries, respectively. The third sinus, the right posterior aortic sinus, typically does not give rise to a vessel. Coronary vessel branches that remain on the surface of the artery and follow the sulci of the heart are called epicardial coronary arteries.[1]