Subsequently, for the 12th case, the HLA typing was HLA-H*02:01:01:01 homozygous for the AF, HLA-H*02:03:02 and *02:05:01:01 heterozygous for the biological mother, and HLA-H*02:03:02 homozygous for the child in question. This evidence concerns the gene HLA-H and atrial fibrillation.