A comparison analysis of the frequencies of the alleles and genotypes of thepolymorphisms in the TGFB1 gene depending on the disease responsible for theheart failure and subsequent cardiac allograft transplantation revealed thatpatients with DCM carried the GG genotype of rs1800469 more frequently thanpatients with IHD did (p = 0.03; OR = 2.68; 95% CI, 1.061–6.793)(Fig. 3). Here, TGFB1 is linked to familial dilated cardiomyopathy.