C ardiovascular disease underlies the majority of deaths in patients with dialysis-dependent end-stage renal disease (ESRD). 1 Standard cardiovascular therapies have rarely been tested in this population and with disappointing results. For example, 3 trials of HMG-CoA reductase inhibitors found that neither overall nor cardiovascular mortality was reduced in hemodialysis (HD) patients treated with statins compared with placebo. 2-4 These and other findings highlight the need to evaluate therapies to reduce cardiovascular morbidity and mortality specifically in patients receiving maintenance dialysis. 5 Several lines of evidence suggest that in ESRD, the heart undergoes progressive fibrosis and rarefaction of the microvasculature, 6-8 structural changes that predispose to arrhythmias and contribute to heart failure by reducing
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