Abstract

MARQUEZ-GONZALEZ, Horacio et al. Prognostic factors of protein-losing enteropathy in a Mexican cohort of patients with congenital heart disease, surgically corrected with Fontan procedure. Rev. Mex. Cardiol [online]. 2015, vol.26, n.4, pp.163-168. ISSN 0188-2198.

Background: Protein-losing enteropathy (PLE) is a known postoperative complication affecting about 10% of patients surgically managed with Fontan procedure. The mortality rate associated with this complication increases to 50%. Objective: To determine the risk factors associated to the development of PLE in patients surgically managed with Fontan procedure. Methods: This was a case-cohort study, and the universe of the trial comprised all patients treated with univentricular surgery. We included male and female patients with congenital heart disease that conditioned a single ventricle syndrome. Those patients with previous intestinal disease causing protein loss, were excluded, cow's milk protein allergy, intestinal resection (previous or after heart surgery), use of cyclic parenteral nutrition or Fontan's dismantlement. Follow-up began immediately after hospital discharge from Fontan procedure. Outcome variable was the development of PLE; independent variables were some before and after surgery hemodynamic and echocardiographic variables, infections and treatment. Statistical analysis: We used measures of statistical dispersion and central tendency. Risk was calculated for each variable estimating the hazard ratio (HR), adjusted for confounding factors; and Kaplan-Meier estimator was used for survival analysis. Results: Eleven (26%) out from patients 42 developed PLE. The median of time between Fontan procedure and the development of this complication was five years. The prognostic variables were: systolic pressure of pulmonary artery between 12-15 mmHg, > 3 years between Glenn and Fontan procedures, aggravated chronic malnutrition, direct bilirubin values > 1.5 mg/dL, pulmonary resistances (APR) between 3-3.5 Wood units, previous hepatomegaly and pleural effusion > 6 day-period. The probability of dying from PLE was 63% in a 10-year period. Conclusions: The prognostic factors associated with PLE are previous hepatic damage and borderlines values of venous pressure.

Keywords : Fontan procedure; protein-losing enteropathy; congenital heart disease; prognostic value.

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