Fig. 6.

Late postoperative imaging in an 8-year-old girl with a history of D-transposition of the great arteries and coarctation status post repair, imaged for routine evaluation. a, b Coronal (a) and sagittal oblique (b) reconstructions from CT angiography demonstrate decreased caliber of right coronary artery as it courses around the main pulmonary artery to the right atrioventricular groove (arrows). c Three-dimensional reconstruction from CT angiography, viewed from the anterior with the pulmonary artery and ascending aorta removed above the sinotubular junction, also demonstrates right coronary artery narrowing (arrow). This focal narrowing corresponded to an area of decreased myocardial perfusion in the right coronary artery distribution on subsequent stress cardiac MR (not shown). This was thought to be a result of mass effect from the pulmonary artery