And in AGT block 2, ‘TT’ haplotype (carrying rs3789678-T-allele) was associated with risk of AF, compared with the common ‘TC’ haplotype between the AF group and the healthy control group, (P = 0.013, OR = 1.332 and 95% CI = 1.063–1.669), adjusted for age, gender, LVEF, LVEDD, LAD and frequency of hypertension and diabetes (Table 6). The gene discussed is AGT; the disease is atrial fibrillation.