Driver diagram showing the primary and secondary outcomes following specific interventions. BHR, Barking, Havering & Redbridge NHS Trust; DNAR, do not attempt resuscitation; ICD, implantable cardioverter defibrillator. Driver diagram showing the primary and secondary outcomes following specific interventions. BHR, Barking, Havering & Redbridge NHS Trust; DNAR, do not attempt resuscitation; ICD, implantable cardioverter defibrillator. MR Javaid et al. BMJ Open Qual 2018;7:e000254 © Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/