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  • Title: Could we still improve early and interim outcome after prosthetic systemic-pulmonary shunt? A risk factors analysis.
    Author: Mohammadi S, Benhameid O, Campbell A, Potts J, Joza J, Al-Habib H, Sett S, Le Blanc J.
    Journal: Eur J Cardiothorac Surg; 2008 Sep; 34(3):545-9; discussion 549. PubMed ID: 18635367.
    Abstract:
    OBJECTIVE: To identify factors associated with in-hospital and interim mortality in children with a systemic-to-pulmonary shunt (SPS). METHODS: Between January 1988 and April 2005, 226 children with a median age of 17 days, and weight of 3.4 kg, underwent an isolated SPS for pulmonary atresia (PA)-VSD/ tetralogy (n=124, 54.9%), functional single ventricle PA (n=35, 5.5%), PA-intact septum (IS, n=31, 13.7%), transposition of the great arteries VSD-PA (n=30, 13.3%), and double outlet right ventricle-PA (n=6, 2.6%). Surgery was performed through sternotomy (group S, n=46) or thoracotomy (group T, n=180). The origin of the SPS was either the innominate artery (n=38) or ascending aorta (n=8) in group S, and the subclavian artery (n=180) in group T. RESULTS: In-hospital mortality was 5.7%. Univariate and logistic regression analysis revealed younger age (p=0.01), lower body weight (p<0.04), a diagnosis of PA-IS with severe right ventricle hypoplasia (p=0.005), preoperative intubation (p=0.03), increased length of intubation (p<0.0001), longer ICU stay (p<0.0001), and group S (p=0.03) as risk factors for in-hospital death. Group S had a longer median ventilation time (112 vs 30 h, p<0.0001) despite the similar median age, weight, mean indexed shunt size (1.19 vs 1.15 mm/kg, p=0.2), and the number of patients with antegrade pulmonary flow. Interim mortality was 7% (n=15), and younger age (p=0.03), and group T (p=0.03) were independent risk factors for death prior to second-stage surgery. Absence of antiplatelet agents or anticoagulants was not a risk factor for interim mortality. CONCLUSIONS: In-hospital mortality and longer ventilation time after SPS by sternotomy may be related to pulmonary over circulation due to shunt insertion origin and/or size, and pathologic features. Early and interim outcomes can be improved by using a smaller shunt or changing the SPS insertion origin when using a sternotomy approach.
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