Statistical analysis confirmed the significant increment of the DRB1*01 DQB1*0501 haplotype (p = 0.03) previously reported by our laboratory in patients with cardiomyopathy.
Allele frequencies comparison between patients with and without cardiomyopathy showed a higher frequency of DRB1*01, DRB1*08 and DQB1*0501 and a decreased frequency of DRB1*1501 in the patients with arrhythmia and congestive heart failure.