Figure 17. Coronary artery anomaly. Oblique axial CT scan shows an anomalous right coronary artery (arrowheads) that arises from the left aortic sinus and courses between the ascending aorta (aA) and the pulmonary trunk (PT). An anomalous coronary artery may be compressed between the great arteries, a condition that may lead to myocardial ischemia or infarction.