Figure 13: Usual coronary artery pattern seen in TGA. A – The LCA divides into the LAD, a diagonal branch (Diag), and the LCx. B – The RCA gives off the sinus node artery (SN) and a pre-ventricular (PV) branch before reaching the right AV groove. C – A view of the opened aortic root showing the coronary ostia from the posterior facing sinuses.