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Background Scar burden has been shown to be an independent predictor of mortality in patients with severe ischemic cardiomyopathy (ICM). However, it is unclear how both scar burden and end systolic volume (ESV) impact outcomes in patients with severe ischemic (ICM). Purpose In patients with severe ICM, we sought to assess the association of ESV and scar burden with outcomes in severe ICM. Methods 450 patients with > 70% stenosis in ≥1 epicardial coronary artery (75% men, median age 63 years, median LV ejection fraction (EF) 22%, median ESVi 106ml, median scar % of 29%) underwent delayed hyperenhancementMRI (Siemens 1.5-T scanner, Erlangen, Germany) between 2003-2007. CMR evaluation included long and short axis assessment of LV function on balanced steady state free precession images along with assessment of myocardial scar (on phase-sensitive inversion recovery DHE-CMR sequence ~ 10-20 minutes after injection of 0.2 mmol/kg of Gadolinium dimenglumine). Scar was identified as regions of interest > 2 SD above normal myocardium. LV scar was was recorded as a percentage of the total myocardium and transmural extent (0 = none, 1 = 1-25%, 2 = 26-50%, 3 = 51-75%, and 4 = > 75%). Total scar score was determined from the summed scar score of 17 segments per patient divided by 17. Cox proportional hazards survival modeling, using a primary end-point of all-cause mortality, was used to risk-adjust comparisons. Results

End systolic volume and scar burden are incremental and independent predictors of survival in patients with severe ischemic cardiomyopathy