IL6 and congestive heart failure: Pre-implant IL-6 levels of all LVAD-candidates were higher than those observed in CHF patients [9.5 (3.5-25.2) and 2.3 (1.5–5.6) pg/mL, respectively, p = 0.002], but among LVAD candidates, only patients of group B showed IL-6 levels significantly higher than CHF patients (p<0.001).