The purpose of this article is to establish an understanding of tetralogy of Fallot, a rare heart disease. Tetralogy of Fallot is a congenital heart defect present at birth, where the structure of the heart is problematic. This changes normal blood flow in the heart. The aspects explained are the overall disease and its symptoms. Second, the long-term and short-term effects corresponding to a particular disease. Finally, the causes, prevention and statistics of the disease. This research will provide insight into the disease and all its aspects and forms. This will allow us to better understand how to deal with such an illness or better prepare ourselves in case this illness may be present and needs to be treated. Description of the diseaseTetralogy of Fallot is a congenital heart disease that involves four different heart defects. in one. The four different heart defects are large ventricular septal defect (VSD), pulmonary stenosis, right ventricular hypertrophy, and aorta dominance. These birth defects alter normal blood flow...... middle of paper ...... Tetralogy of Fallot occurs during fetal growth, when the baby's heart is developing. In most cases, the cause of this disease is unknown. Prevention and statistics Although there is no known prevention for this disease, it is recommended that the mother does not put the growing fetus in danger, such as smoking or drinking during pregnancy and undergo regular check-ups with of the doctor. doctor. Statistics show that approximately 5 out of 10,000 babies suffer from this anomaly. The defect can appear in both boys and girls, but studies have shown that it occurs more in boys than girls. Tetralogy of Fallot, although a rare defect, is the most common form of cyanotic congenital heart defect. Studies have shown that there are more cases of TOF and pulmonary stenosis rather than TOF and pulmonary atresia and both have been increasing in recent years..