Abstract
The purpose of this study was to evaluate the characteristics of patients with congenital heart disease (CHD) who developed necrotizing enterocolitis (NEC). A retrospective review of neonates with CHD at a tertiary care center between January 2006 and January 2016 was performed. Diagnosis of NEC was based on modified Bell's criteria. Patients were grouped by Risk Adjustment for Congenital Heart Surgery (RACHS-1) or by ductal-dependent (DD) lesions that require a patent ductus arteriosus to supply pulmonary or systemic circulation. Of 1811 neonates with CHD, 3.4% (n=61) developed NEC. Eighteen (30%) of these required surgical management. The rate of NEC among DD patients was 5% (n=33/653), compared to 2.4% (n=28/1158) in the non-DD group (p=0.003). RACHS-1 score>2 had a higher rate of NEC 6.2% (41/658) compared to RACHS-1≤2 cases, 1.7% (20/1153) (p=0.005). DD patients and complex patients with RACHS-1>2 were more likely to develop NEC after cardiac surgery. Hypoplastic left heart syndrome patients had a rate of 9% (n=16/185). Surgical NEC was more prevalent in the non-DD group. Mortality was similar among groups. CHD patients with ductal-dependent lesions or complex cases (RACHS-1 score>2) have higher rates of NEC than non-ductal-dependent patients or RACHS-1 score of 2 or less. Mortality is similar regardless of ductal dependence, but surgical NEC was more prevalent in non-DD patients. Level IIb.
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