Child heart surgery hospital review
4 July 2012 Last updated at 10:52 BST
Hospitals that perform child heart surgery are due to learn which will have to stop performing the operations.
An NHS review was carried out amid fears that expertise was spread too thinly, and has already concluded surgery should be concentrated on fewer sites.
Centres in Leicester, Leeds, Newcastle, Southampton, Bristol and London are under threat
Susana Mendonca reports.