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

Figure 5

Case 4: 3D volume-rendered coronary image showing a single coronary artery arising from the right coronary sinus (RCS). The right coronary artery (red arrow) has a normal course. The left main coronary artery (blue arrow) arises from the proximal RCA and then courses to the left through the septal myocardium (transseptal) before it emerges in the proximal left interventricular groove and gives rise to the left anterior descending artery and left circumflex artery (pink arrow). There is significant narrowing of the transseptal segment of the left main coronary artery (green arrow). AO: aorta; LCS: left coronary sinus.