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Ann Thorac Surg 1994;57:461-465
© 1994 The Society of Thoracic Surgeons
Victorian Cardiac Surgical Unit, Royal Children's Hospital, Melbourne, Australia
Accepted for publication August 17, 1993.
* Address reprint requests to Dr Karl, Victorian Paediatric Cardiac Surgical Unit, Royal Children's Hospital, Remington Rd. Parkville, Victoria, Australia 3052.
Translocation of an intramural coronary artery is one of the most challenging problems in anatomic correction of transposition of the great arteries. Of 259 patients undergoing arterial switch procedure for transposition of the great arteries in our hospital, 12 (4.6%) were found to have intramural coronary arteries. The diagnosis was made intraoperatively in all patients. There were five different types of intramural coronary anatomy noted, with ostial stenosis present in half. The operative technique consisted of detachment of the posterior commissure of the aortic valve and unroofing of the intramural segment of the coronary artery by excision of a triangular portion of internal aortic wall. The coronary arteries were excised as a single disc, which was divided into two cuffs. The arterial switch was then performed in the usual fashion. The posterior commissure of the aortic valve was resuspended to the pericardial patch used to reconstruct the neopulmonary artery sinus. There were no operative or late deaths over a follow-up of 328 patient-months. Fostoperatively, no patient showed ischemic changes on electrocardiogram or abnormal wall motion on echocardiogram. We believe that intramural coronary arteries can be managed satisfactorily with this technique, and mat arterial switch will be possible in all cases.
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