Mild postoperative acute kidney injury and outcomes after surgery for congenital heart disease.

Objective: The effect of mild acute kidney injury (AKI) on outcomes after heart surgery in children is unclear. We sought to characterize the epidemiology of mild AKI associated with surgery for congenital heart disease (CHS-AKI) in children.

Methods: We conducted a single-center, retrospective cohort study of 693 patients (aged 6 days-18 years) who underwent heart surgery in 2009.