Number of patients who would have benefitted from addition of ACE inhibitor (ACEi), beta blockers (BB) or optimal therapy (one or both of ACEi and BB) and the number of patients who received no treatment or treatment with ACEi, BB or both from 2010 to 2013. Number of patients who would have benefitted from addition of ACE inhibitor (ACEi), beta blockers (BB) or optimal therapy (one or both of ACEi and BB) and the number of patients who received no treatment or treatment with ACEi, BB or both from 2010 to 2013. Simon Walker et al. Open Heart 2017;4:e000726 ©2017 by British Cardiovascular Society