**21. Quality improvement and risk stratification in congenital cardiac surgery**

There are various risk-stratification scores in congenital cardiac surgery such as RACHS-1 and Aristotle Comprehensive Complexity Score. This places into perspective the mortality and morbidity rates of the hospital relative to the complexity of the cases they accept.

Databases exist such as the Society of Thoracic Surgeons database (STS) and EACTS congenital database which allows surgeons to compare the results of their surgery on various diagnoses with those of various others across the world.
