highly significantp = 6.2 × 10 4
Considering the polymorphic variants of SCN5A, rs1805124 (H558G), the G558 allele had similar frequencies in all studies (24.4%, 18.4% and 23.4%, respectively), with a highly significant association with the PR interval value ( p = 6.2 × 10 4 , heterogeneity of p = 0.09).