Early and Midterm Results of the Arterial Switch Operation: A 9-Year, Single-Center Experience
Background: The arterial switch operation (ASO) has become the surgical approach of choice for transposition of the great arteries. The aim of this paper was to describe the outcomes in patients who underwent arterial switch operation and to analyze the predictors of in-hospital mortality and further need for reoperation at a single-center institution. We reviewed our 9-year experience with arterial switch operation (ASO) for transposition of the great arteries (TGA) or Taussig-Bing anomaly (TBA) to assess the early and midterm outcomes.
Methods: Between January 2007 and May 2016, 34 consecutive patients who underwent ASO for TGA with IVS; and TGA with ventricular septal defect (VSD); and double outlet right ventricle (DORV) with subpulmonary VSD at our institution were included in this retrospective study. The same surgeons operated on all patients. Patients’ charts, surgical reports, and echocardiograms were retrospectively reviewed. Median follow-up time ranged from 1 to 9 years, 54.2 (0.4-108) months.
Results: There were 2 (5%) in-hospital deaths. Late death occurred in 1 (2.9%) of 32 survivors. One patient (2.9%) required reintervention. The freedom from reintervention rate was 95.9 Â± 1.8% at 9 years. Two patients (3.9%) developed moderate neoaortic regurgitation during the follow-up and one patient underwent reoperation mainly for neopulmonary artery stenosis. The analysis showed that weight, cross-clamp (CC) time, cardiopulmonary bypass (CPB) time, and age of operation are strong predictors for mortality.
Conclusion: ASO remains the procedure of choice for the treatment of various forms of TGA with acceptable early and midterm outcome, and can also be performed with a low risk of early mortality and satisfactory midterm outcomes even in a small-volume center. Early and midterm survival is excellent after arterial switch operation.
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