Single nucleotide polymorphisms (SNPs) were explored by Dou et al. [27] in the NAMPT gene, where specific haplotypes (e.g., T-A-C) were associated with protective effects against DCM, while rs9034 variants correlated with prognosis and survival, positioning this locus as a candidate prognostic biomarker. Here, NAMPT is linked to familial dilated cardiomyopathy.