Figure 1
(A, B) Volume-rendered images of coronary computed tomography angiography demonstrate absence of the left main coronary artery segment. The left anterior descending (LAD) artery and the left circumflex (LCx) artery are seen arising directly from the left coronary sinus (LCS) with separate ostia. The right coronary artery (RCA) is seen orthotopically arising from the right coronary sinus. Virtual dissection image (C) shows the separate ostia of the left anterior descending (LAD) and left circumflex (LCx) arteries.