Genetic and Mechanistic Drivers of Atrioventricular Septal Defects in Down Syndrome
Megan Thomas Background: Down syndrome (DS), caused by trisomy 21, is strongly associated with congenital heart defects (CHDs), especially atrioventricular septal defects (AVSDs). AVSD develops from abnormal formation of the endocardial cushions and atrioventricular canal during embryonic heart development, leading to improper septation and valve defects. However, not all individuals…