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The Journal of Thoracic and Cardiovascular Surgery, Vol 103, 872-876, Copyright © 1992 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association

ARTICLES

Complex coronary arterial anatomy in transposition of the great arteries. Arterial switch procedure without coronary relocation

NE Moat, A Pawade and RK Lamb
Wessex Cardiothoracic Centre, Southampton General Hospital, Shirley, United Kingdom.

Translocation of the coronary arteries remains a technical problem in anatomic correction of transposition of the great arteries. Myocardial ischemia related to difficulties with coronary relocation is a significant factor in perioperative morbidity and mortality, particularly in those patients with complex coronary anatomy. Two neonates with transposition of the great arteries and intact ventricular septum are described in whom the coronary arteries arose from multiple ostia, all lying within sinus 1, with one of the ostia in each instance being severely eccentric. An anatomic switch of the great vessels was done without coronary relocation. This was achieved by means of an aortopulmonary fenestration with a bovine pericardial tunnel to allow coronary artery perfusion with blood from the neoaorta. An additional pericardial patch was placed to the contralateral wall of the proximal neopulmonary artery. Both infants had an uneventful postoperative recovery with no evidence of myocardial ischemia, although both have a mild gradient across the proximal pulmonary artery. This operative technique may be appropriate in those patients in whom there is concern over the feasibility of translocating the coronary arteries without producing myocardial ischemia.

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