Prevalence, Spectrum, and Outcomes of Single Coronary Artery Detected on Coronary Computed Tomography Angiography (CCTA)

Figure 2

Case 1 (a) and case 9 (b): 3D volume-rendered coronary image showing a single coronary artery arising from the right coronary sinus (RCS) with a dual left anterior descending artery (LAD) variant. The right coronary artery (red arrow) has a normal course. The left main coronary artery (blue arrow) arises from the proximal RCA, and then it has a retroaortic course to the left before it gives the short segment of the LAD (green arrow) and the left circumflex artery (pink arrow). The long segment of the dual LAD variant arises from the proximal RCA, and it has a prepulmonic course in case 1 and transseptal course in case 9 before it reaches the distal anterior interventricular groove (orange arrow). AO: aorta; LCS: left coronary sinus; NCS: none coronary sinus; LA left atrium.

(a)

(b)