The Aristotle score: a complexity-adjusted method to evaluate surgical results1

Objectives: Quality control is difficult to achieve in Congenital Heart Surgery (CHS) because of the diversity of the procedures. It is particularly needed, considering the potential adverse outcomes associated with complex cases. The aim of this project was to develop a new method based on the complexity of the procedures. Methods: The Aristotle project, involving a panel of expert surgeons, started in 1999 and included 50 pediatric surgeons...