Anomalous origin of the coronary arteries from the pulmonary arteries
Coronary artery origin from pulmonary artery refers to one coronary artery or its branches (left anterior descending coronary artery or left circumflex coronary artery) or two coronary arteries originating from the proximal pulmonary trunk or rarely from the proximal right pulmonary artery. In normal development, the pulmonary trunk also grows coronary artery buds, but usually degenerates and disappears. The left or right coronary artery plexus is not connected to the aortic sinus bud, but abnormally connected to the pulmonary artery bud, resulting in abnormal origin of coronary artery from pulmonary artery.