Expected survival after CRT compared with the general population. (A) Expected survival after CRT-D (solid green) or CRT-P (solid blue line) relative to the life expectancy in the general population in England (solid blue line), for the period 2015–2017 is shown. (B) The effect of comorbidity, defined in terms of the CCI is shown. For detailed calculations, see Supplementary material online, Appendix. CRT, cardiac resynchronization therapy.