Figure 1.
Panel (
A): Curved multiplanar reconstruction images of the left circumflex artery (LCx) demonstrate its course around the atrioventricular groove. The left main coronary artery was also absent, with both left anterior descending (LAD) and LCx arising from the left coronary sinus with a “double-barrel” appearance. Regardless of the branches involved (right coronary artery, LAD, or LCx), the four classical coronary course variants are classified as normal, pre-pulmonary, interaorto-pulmonary, and retroaortic [
1,
2,
3]. Panel (
B): Maximum intensity projection of the left circumflex coronary artery (LCx) course. LCx emerges from the left coronary sinus and has a 3 mm diameter. It travels in the left atrioventricular (AV) groove, continues in the AV groove of the inferior aspect of the heart, and then ascends in the right AV groove to the right auricular ostium. Its ramifications include two marginal branches, a posterolateral branch, a thin posterior descending artery, and, from the right AV groove, an acute marginal branch (AM) and a branch to the sinoatrial node. A note is made of the missing right coronary artery (RCA). Panels (
C–
F): The 3D virtual rendering technique (VRT) illustrates the absence of the right coronary artery arising from the right coronary sinus, the absence of the left main coronary artery, and the double-barrel appearance. LCx travels around the heart in the AV groove. Panels (
E,
F) visualize three diverticular dilatations on the inferior side of the right ventricle (RV; white stars). Such diverticular dilatations of the RV are rare and have variable natural history, requiring supportive treatment unless they are causing symptoms. LA: Left atrium, LV: Left ventricle, RV: Right ventricle, RA: Right atrium, LCS: Left coronary sinus, RCS: Right coronary sinus, Ao: Aorta, LAD: Left anterior descending coronary artery, LCx: Left circumflex coronary artery, Five-pointed star: Right ventricle diverticulum.
Figure 1.
Panel (
A): Curved multiplanar reconstruction images of the left circumflex artery (LCx) demonstrate its course around the atrioventricular groove. The left main coronary artery was also absent, with both left anterior descending (LAD) and LCx arising from the left coronary sinus with a “double-barrel” appearance. Regardless of the branches involved (right coronary artery, LAD, or LCx), the four classical coronary course variants are classified as normal, pre-pulmonary, interaorto-pulmonary, and retroaortic [
1,
2,
3]. Panel (
B): Maximum intensity projection of the left circumflex coronary artery (LCx) course. LCx emerges from the left coronary sinus and has a 3 mm diameter. It travels in the left atrioventricular (AV) groove, continues in the AV groove of the inferior aspect of the heart, and then ascends in the right AV groove to the right auricular ostium. Its ramifications include two marginal branches, a posterolateral branch, a thin posterior descending artery, and, from the right AV groove, an acute marginal branch (AM) and a branch to the sinoatrial node. A note is made of the missing right coronary artery (RCA). Panels (
C–
F): The 3D virtual rendering technique (VRT) illustrates the absence of the right coronary artery arising from the right coronary sinus, the absence of the left main coronary artery, and the double-barrel appearance. LCx travels around the heart in the AV groove. Panels (
E,
F) visualize three diverticular dilatations on the inferior side of the right ventricle (RV; white stars). Such diverticular dilatations of the RV are rare and have variable natural history, requiring supportive treatment unless they are causing symptoms. LA: Left atrium, LV: Left ventricle, RV: Right ventricle, RA: Right atrium, LCS: Left coronary sinus, RCS: Right coronary sinus, Ao: Aorta, LAD: Left anterior descending coronary artery, LCx: Left circumflex coronary artery, Five-pointed star: Right ventricle diverticulum.
![Diagnostics 11 01199 g001]()