The present study shows that the genotype distribution of NFKB1 gene -94 insertion/deletion ATTG polymorphism in DCM patients is significantly different from that in control subjects, and (ATTG1/ATTG2+ATTG2/ATTG2) genotype frequency is higher in DCM patients than that in control subjects. Here, NFKB1 is linked to familial dilated cardiomyopathy.