Atrial Heart Septal Defect 7, also known as atrial septal defect-atrioventricular conduction defects syndrome, is related to atrial septal defect 7 with or without atrioventricular conduction defects and atrial septal defect 2. An important gene associated with Atrial Heart Septal Defect 7 is NKX2-5 (NK2 Homeobox 5). Affiliated tissues include heart, and related phenotypes are arrhythmia and bundle branch block