Isolated/primary – without CHD: | Secondary – with CHD: |
• Congenital coronary artery fistula | • PA + IVS |
• Anomalous origin of accessory coronary arteries from the pulmonary artery | • AA + MS |
• Ectopic origin of the coronary arteries from aortic sinus |  |
• Absence of a coronary artery |  |