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  • Title: Determinants of repair type, reintervention, and mortality in 393 children with double-outlet right ventricle.
    Author: Bradley TJ, Karamlou T, Kulik A, Mitrovic B, Vigneswaran T, Jaffer S, Glasgow PD, Williams WG, Van Arsdell GS, McCrindle BW.
    Journal: J Thorac Cardiovasc Surg; 2007 Oct; 134(4):967-973.e6. PubMed ID: 17903515.
    Abstract:
    OBJECTIVE: We sought to define the prevalence of definitive end-states and their determinants in children with double-outlet right ventricle. METHODS: We performed a clinical record review of 393 children with double-outlet right ventricle presenting to our institution from 1980 to 2000. RESULTS: Double-outlet right ventricle classification was as follows: subaortic ventricular septal defect with or without pulmonary stenosis in 47%, subpulmonic ventricular septal defect in 23%, noncommitted ventricular septal defect in 26%, and doubly committed ventricular septal defect in 4%. Hypoplastic ventricles were present in 39%, pulmonary stenosis was present in 65%, and aortic arch obstruction was present in 24%. Biventricular repair was performed in 194 patients (55%) at a median age of 10 months (range: birth to 14.0 years), and the Fontan operation (n = 182; 23%) was performed at a median age of 3.7 years (range: 6 months to 14.9 years). Results improved over time (P < .001). Factors discriminating among end-states included younger patient age at presentation (P < .001), lower weight (P < .001), and adequacy of left-sided heart structures, especially the size of the left ventricle (P < .001), aortic arch (P < .001), and mitral valve (P = .004). For complex double-outlet right ventricle, Rastelli-type repair increased early reintervention risk (P = .04) and late post-repair mortality (P = .02), whereas the arterial switch operation increased early post-repair mortality (P = .02) with a benefit of improved late post-repair survival. CONCLUSIONS: Biventricular repair, especially Rastelli-type reconstruction, is associated with higher late mortality and reintervention than is Fontan repair. The wisdom of extending biventricular repair to borderline anatomic candidates with hypoplastic left-sided structures or a nonsubaortic ventricular septal defect is questionable.
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