Coarctation of the aorta is a serious heart disease caused by a congenital narrowing of the main artery that carries blood from the heart to the body. This narrowing makes blood circulation difficult and can cause problems such as high blood pressure, overworking of the heart, and insufficient blood supply to the organs. Early diagnosis, regular follow-up, and, when necessary, surgical or catheter-based treatment are of great importance for children's healthy development.