651 Xu Xu YJ YJ Qiu Qiu XB XB Yuan Yuan F F Shi Shi HY HY Xu Xu L L Hou Hou XM XM Prevalence and Spectrum of NKX2.5 Mutations in Patients with Congenital Atrial Septal Defect and Atrioventricular Block Prevalence and Spectrum of NKX2.5 Mutations in Patients with Congenital Atrial Septal Defect and Atrioventricular Block Mol Med Rep Mol Med Rep 2017 2017 15 15 4 4 2247 2247 2254 2254 10.3892/mmr.2017.6249 10.3892/mmr.2017.6249 28259982 28259982. This evidence concerns the gene NKX2-5 and atrial septal defect.