Symptoms of GATA4 Gene Tetralogy of Fallot Genetic Test Tetralogy of Fallot (ToF) is a congenital heart defect that is complex and multifactorial in nature. It is characterized by four heart defects that occur together: a ventricular septal defect (VSD), pulmonary stenosis, right ventricular hypertrophy, and an overriding aorta. While the exact cause of ToF […]
