Classification of origin and proximal epicardial course of coronary arteries in transposition of the great arteries.

The complexity of the variability in aortic origin and epicardial course of the coronary arteries relative to the pedicles of the great arteries in hearts with transposition of the great arteries is evident in that there is no simple classification to include all the possible variations of the coronary artery patterns. Therefore, a simplified and yet all-inclusive classification is proposed in which the origin of the coronary arteries is defined as seen by an observer looking from the pulmonary artery toward the aorta. This promote and classification should expedite and promote the international exchange of data regarding coronary artery anatomy in transposition of the great arteries and should assist in the surgical management of this condition.