Among 88 SNPs (MAF ≥ 0.10, call rate ≥ 0.8, HWE p-value ≥ 0.001) in 9 genes implicated in congenital Long QT Syndromes or QT interval duration, only SNPs in NOS1AP had p < 0.05 for association with QT interval duration (Table 5). The gene discussed is NOS1AP; the disease is Prolonged QT interval.