Repair of Corrected Transposition of the Great Arteries

ABSTRACT

PURPOSE: To assess the clinical characteristics and surgical approaches in different anatomical and hemodynamic types of corrected transposition of great arteries(TGA) and learn the surgical results of those patients. METHODS: All 52 patients who were diagnosed as corrected TGA between December 1987 and November 1999 and their medical records were reviewed. Three groups were identified according to associated anomalies', Group 1: TGA with intact ventricular septum(n=7), Group 2: TGA with ventricular septal defect(n=6), Group 3: TGA with ventricular septal defect and pulmonary stenosis(n=39). RESULTS: The clinical manifestations and managements according to associated anomalies were different. The average ages at operation were 190, 8.8 and 47 months in Groups 1, 2, and 3, respectively. The five patients underwent double switch operation and the remainder were managed conventionally without correcting discordant connection. Four patients died and 5 patients were re-operated. Eleven patients developed complete heart block, and 7 of them had permanent pacemakers. Progressive systemic tricuspid valve regurgitation developed in 15 patients and progressive systemic right ventricle dysfunction developed in 3 patients. CONCLUSION: The results of conventional management were disappointing, with significant morbidity of tricuspid failure, right ventricle failure and conduction system failure. Anatomical repair of corrected TGA can be achieved with favorable immediate surgical results but long-term follow up will be necessary.