Ann Pediatr Card Close
 

Figure 6: Embryology of the right circumflex aortic arch in this case. (a) Shows a hypothetical embryonic arch model that consists of the third, fourth and sixth aortic arches from up to down respectively. (b) The yellow small circles indicate how a normal left aortic arch is developed. (c-e) The yellow small circles demonstrate the speculation for the development of a right circumflex aortic arch. The proximal aortic arch should arise from an arch higher (i.e. the third aortic arch) than the distal aortic arch, which seems to arise from the fourth arch. This explains both the higher position of proximal arch and the elongated length of the transverse aortic arch. (f) Shows the CT angiographic image of the aortic arch in this patient

Figure 6: Embryology of the right circumflex aortic arch in this case. (a) Shows a hypothetical embryonic arch model that consists of the third, fourth and sixth aortic arches from up to down respectively. (b) The yellow small circles indicate how a normal left aortic arch is developed. (c-e) The yellow small circles demonstrate the speculation for the development of a right circumflex aortic arch. The proximal aortic arch should arise from an arch higher (i.e. the third aortic arch) than the distal aortic arch, which seems to arise from the fourth arch. This explains both the higher position of proximal arch and the elongated length of the transverse aortic arch. (f) Shows the CT angiographic image of the aortic arch in this patient