Transposition of the great arteries and isolated origin of the sinus node artery

We report the cases of 2 newborns who underwent at 7 days of age an arteria l switch operation for transposition of the great arteries with a rare coro nary anomaly: the left and right coronary arteries originated with a single ostium from sinus 1 and the sinus node artery had an isolated origin from sinus 2. The sinus node artery was reimplanted into the new aorta in both p atients. Both babies were discharged in sinus rhythm. Preserving the vascul arization of the sinus node may avoid the occurrence of postoperative atria l rhythm disturbances. (C) 1998 by The Society of Thoracic Surgeons.