BAG3 and familial dilated cardiomyopathy: Specifically, higher plasma concentrations of BAG3 (BAG family molecular chaperone regulator 3) improved six CMR traits and decreased the risk of HF [odds ratio (OR), 0.75; 95% CI, 0.72 to 0.79], non-ischemic CM (OR, 0.30; 95% CI, 0.25 to 0.36), and DCM (OR, 0.14; 95% CI, 0.11 to 0.17) (Fig. 6, fig.