Research recommendation(s) from an individual piece of guidance Guidance: Normothermic extracorporeal preservation of hearts for transplantation following donation after brainstem death Date issued: 24 February 2016 Research recommendations coming out of this guidance NICE encourages further research into normothermic extracorporeal preservation of hearts for transplantation following donation after brainstem death. Outcomes should include primary graft function, graft function in the long term and device-related complications.