Shown is the morphologic derivation of proximal pulmonary and aortic vessels at birth. The main pulmonary artery (MPA) comes from the fused ventral VIth arterial arch (FV-VI), while the right and left pulmonary arteries (RPA and LPA) come from the right (RV-VI) and left ventral VIth arterial arches (LV-VI). The ascending aorta (AAo) and right brachiocephalic artery (RBCA) are derived from the right ventral IVth arterial arch (RV-IV), while the aortic arch (Ao arch) comes from the left ventral IVth arterial arch (LV-IV). The ductus arteriosus (DA) is derived from the left dorsal VIth arch (LD-VI).
LSA: left subclavian artery; LCA: left carotid artery; RSA: right subclavian artery; RCA: right carotid artery.
With permission from Skidmore FD, Ann R Coll Surg Engl 1975; 57:186.
Graphic 55186 Version 3.0
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