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  • Title: Surgical management of competing pulmonary blood flow affects survival before Fontan/Kreutzer completion in patients with tricuspid atresia type I.
    Author: Wilder TJ, Ziemer G, Hickey EJ, Gruber PJ, Karamlou T, Kirshbom PM, Blackstone EH, DeCampli WM, Williams WG, McCrindle BW.
    Journal: J Thorac Cardiovasc Surg; 2015 Nov; 150(5):1222-30.e7. PubMed ID: 26145767.
    Abstract:
    OBJECTIVES: To determine the association between surgical management of pulmonary blood flow (PBF) at initial and staged procedures with survival to Fontan/Kreutzer operation (Fontan) in patients with tricuspid atresia. METHODS: Infants aged <3 months with tricuspid atresia type I (n = 303) were enrolled from 34 institutions (1999-2013). Among those who underwent surgical intervention (n = 302), initial procedures were: systemic to pulmonary artery shunt (SPS; n = 189; 62%); pulmonary artery banding (PAB; n = 50; 17%); and superior cavopulmonary connection (SCPC; n = 63; 21%). Multiphase parametric-hazard models were used to analyze competing outcomes. RESULTS: Risk-adjusted 6-year survival was lower after SPS (85%; P = .04) versus PAB (93%) or SCPC (93%). Survival after SPS when the main pulmonary artery (MPA) was closed (n = 21) or banded (n = 4) was 60%, versus 93% without MPA intervention (P = .02). After SPS, survival before SCPC was lower with an open ductus arteriosus (n = 7; 76% vs 97%; P = .02). Similarly, after SPS, risk-adjusted survival was similar to that for patients who had an initial PAB or SCPC when MPA intervention was avoided and the ductus arteriosus either closed spontaneously before SPS, or was closed during SPS. For all patients reaching SCPC (n = 277), survival to Fontan was not significantly influenced by whether PBF persisted through the MPA. CONCLUSIONS: Tricuspid atresia patients with SPS represent a high-risk subgroup. Avoiding an open ductus arteriosus and concomitant MPA intervention during SPS may help mitigate the risk associated with SPS. The presence of antegrade PBF through the MPA, at initial and staged operations, did not significantly influence survival to Fontan operation.
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