Higher levels of C1QC (complement C1q subcomponent subunit C) detrimentally affected three CMR traits but nevertheless decreased the risk of HF (OR, 0.97; 95% CI, 0.96 to 0.98) and DCM (OR, 0.86; 95% CI, 0.82 to 0.90) (Fig. 6, fig. Here, C1QC is linked to familial dilated cardiomyopathy.