Case Study A02-6: LCA from RC Sinus - Course Low between PA and Ao. dLAD separately supplied from RCA BUT follows unusual septal course before surfacing in mid anterior IV groove.
Anatomy – This is a unique instance of an anomalous LCA from the RC Sinus that courses low between Ao and PA with a separate dLAD connection with the RC Sinus. The unique feature is the ‘septal’ pathway followed by the anomalous distal LAD through the septum before emerging to the surface in the IV groove. Anomalous distal LAD instances usually pass anterior to the PA.
Construction – (Select Settings > Choose Button Q Nums.) Template buttons Q1.4.2 and Q3.1.A.8 set the stage for is anomaly; the inter-septal LAD pathway is achieved by ‘right-clicking’ on the anomalous LAD and selecting the ‘anomalous septal dLAD’ option.