[Bidirectional Glenn: outcomes and risk factor analysis in a 5 years' experience].

Objective: Bidirectional Glenn shunt is a palliative surgical procedure in patients with single ventricle. Although morbimortality in this surgery is low, risk factors have been described. The purpose of this study is to report our outcomes in Glenn surgery, identifying mortality risk factors in our population.

Methods: Retrospective study between 2005 and 2009. Age, weight, previous surgery, surgical procedure, and postoperative condition were analyzed. Results are reported as median and rank, or absolute values and percentage. Uni and multivariate analysis was made to identify risk factors of mortality and/or prolonged hospitalization (Stata 9.0).

Results: One hundred and one patients were operated; 87 bidirectional Glenn and 14 bilateral Glenn. Median age 15 months (2.5-108), median weight 8.5 kg (4.2-27), and 74% of them with previous surgery. In 54 patients an associated procedure was performed simultaneously, only in 4 additional pulmonary blood flow was left. Median hospitalization was 8 days (2-97). Thirty-five percent of the patients presented complications. No association between age, weight, pulmonary hypertension, cardiopulmonary bypass, cross clamping, associated procedures or Glenn bilateral with mortality or morbidity was found. Overall mortality was 3.9%.

Conclusion: Mortality was similar to other centers, but morbidity in this group of patients is high. No independent risk factors associated with morbidity or mortality were identified.