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The Journal of Thoracic and Cardiovascular Surgery, Vol 102, 386-394, Copyright © 1991 by The American Association for Thoracic Surgery and The Western Thoracic Surgical Association

ARTICLES

Pediatric heart transplantation after operations involving the pulmonary arteries

MM Cooper, L Fuzesi, LJ Addonizio, DT Hsu, CR Smith and EA Rose
Department of Surgery, Columbia-Presbyterian Medical Center, Columbia University College of Physicians and Surgeons, New York, NY 10032.

A prohibitive perioperative mortality has been previously ascribed to pediatric heart transplantation after palliative operations for congenital heart disease involving the pulmonary arteries. Of 46 children who have undergone heart transplantation at our institution between June 1984 and February 1990, 7 (15%; mean age 8 +/- 3 years; range 1 to 18 years) have previously undergone such operations: right ventricle to pulmonary artery conduit/homograft for levo-transposition of the great arteries (2), Waterston shunt for tricuspid and pulmonary atresia (1), pulmonary artery banding for single ventricle (1), Fontan procedure for single ventricle (1), first-stage Norwood procedure for hypoplastic left heart syndrome (1), and classic right Blalock-Taussig shunt for atrioventricular canal with pulmonic stenosis (1). Three categories of pulmonary artery anatomy that require different approaches to reconstruction at the time of transplantation are recognized: abnormalities of position, pulmonary outflow obstruction, and previous systemic- or atrial-pulmonary connections. At operation, individualized pulmonary arterial reconstruction was employed, including use of previously created right ventricular-pulmonary artery conduits/homografts and angioplasty (with and without pericardial patches). Transplantation was successful in all patients. Posttransplant right ventricular-pulmonary artery pressure gradients and pulmonary vascular resistance indices were acceptable, with a tendency to decrease with time. Two patients had critical right ventricular failure postoperatively; one of them required support with extracorporeal membrane oxygenation. There was no perioperative mortality, with three deaths occurring from 5 to 39 months after transplantation. All surviving patients are in New York Heart Association functional class I. Techniques borrowed from the repair of congenital cardiac lesions can be applied to subgroups of children undergoing heart transplantation. Additional length of donor aorta and pulmonary artery should be harvested for possible use in designing pulmonary artery connections. Previous palliative operations involving the pulmonary arteries with associated complex pulmonary artery anatomy are not of themselves an insurmountable obstacle to successful heart transplantation.

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