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Ann Thorac Surg 1998;65:517-524
© 1998 The Society of Thoracic Surgeons
Divisions of Cardiothoracic Surgery and Pediatric Cardiology, University of California, San Francisco, San Francisco, California, USA
Accepted for publication July 25, 1997.
Dr Reddy, 505 Parnassus Ave, M589, San Francisco, CA 94143-0118.
Presented in poster form at the Sixty-ninth Scientific Sessions of the American Heart Association, New Orleans, LA, Nov 10–13, 1996.
Background. The single semilunar valve in patients with truncus arteriosus frequently is dysplastic and dysfunctional. Truncal valve insufficiency has been associated with poor outcome. Although the management of truncal valve insufficiency has evolved over the years, approaches to this problem vary considerably and remain a serious dilemma in many cases.
Methods. We reviewed the records of 89 patients with unrepaired truncus arteriosus and mild (n = 37), moderate (n = 33), or severe (n = 19) truncal valve insufficiency who were admitted to our institution between 1975 and 1995. Eight patients (7 neonates) with moderate or severe insufficiency died before surgical intervention, and 4 patients underwent palliative pulmonary artery banding. The remaining 77 patients underwent repair. The median age at repair was 3.2 months (range, 2 days to 15 years; 83% infants), and it decreased from 4 months between 1975 and 1985 to 1 month between 1986 and 1995. Truncal valve replacement (mechanical = 6, allograft = 4) was performed in 10 patients, and 5 patients underwent valve repair.
Results. All 4 patients who underwent pulmonary artery banding died either early or late. The hospital (or 30-day) mortality rate after repair was 34% (26/77). At a median follow-up of 10 years, 11 hospital survivors had died, with overall 1- and 10-year actuarial survival rates of 56% and 48%, respectively, and poorer survival among patients with severe truncal valve insufficiency (p = 0.02). Late truncal valve replacement (n = 24) had been performed in 21 patients. Freedom from truncal valve replacement was better in patients with mild truncal insufficiency than in those with moderate or severe preoperative insufficiency (p < 0.001). Four late deaths were related directly to reoperation for truncal valve replacement or to prosthetic valve dysfunction. Three of the 4 neonates who received allograft root replacements died within 7 months of repair, and severe allograft valve insufficiency requiring replacement 1 year after operation developed in the fourth.
Conclusions. The prospects for patients with truncal valve insufficiency have been improving over time. Nevertheless, the results in patients with severe insufficiency continue to be poor.
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