Although the analysis of explanted resident hearts provided no new information on the progression of DCM, higher expressions of ACE2 and GlycACE2 were observed in explanted hearts from T2DM patients regardless of the cause of HF (Figs. 4 and 5) to get insight into the pathophysiology of end-stage HFrEF along with diabetes, as previously described [14]. This evidence concerns the gene ACE2 and type 2 diabetes mellitus.