ACE and familial dilated cardiomyopathy: As shown in Table 3, the results show that four gene models of Asian race suggest that there is a significant association between ACE rs4646994 polymorphism and DCM (allele gene model: OR = 1.47, 95% CI = 1.21–1.78, P<0.001; homozygous gene model: OR = 2.28, 95% CI = 1.49–3.47, P<0.001; dominant gene model: OR = 1.72, 95% CI = 1.12–2.64, P=0.01; recessive gene model: OR = 1.67, 95% CI = 1.16–2.39, P=0.05).