A nurse is caring for an infant who has a congenital heart defect. Which of the following defects ts is associated flow? Coarctation of the aorta Patent ductus arteriosus Tetralogy of Fallot Tricuspid atresia

The congenital heart defect associated with decreased pulmonary blood flow is Tetralogy of Fallot.<br /><br />Tetralogy of Fallot is a condition that includes four heart defects: ventricular septal defect (VSD), pulmonary stenosis, right ventricular hypertrophy, and an overriding aorta. The pulmonary stenosis leads to decreased blood flow to the lungs, resulting in reduced oxygenation of the blood.<br /><br />Here are brief descriptions of the other conditions mentioned:<br /><br />- **Coarctation of the aorta**: This is a narrowing of the aorta, which can lead to increased blood pressure before the point of coarctation and decreased blood pressure beyond it. It does not directly affect pulmonary blood flow.<br /><br />- **Patent ductus arteriosus (PDA)**: This is a condition where the ductus arteriosus fails to close after birth, leading to abnormal blood flow between the aorta and the pulmonary artery. It typically results in increased pulmonary blood flow rather than decreased.<br /><br />- **Tricuspid atresia**: This is a condition where the tricuspid valve is absent or abnormally developed, leading to restricted blood flow from the right atrium to the right ventricle and subsequently to the lungs. This condition also results in decreased pulmonary blood flow but is less commonly referenced compared to Tetralogy of Fallot.<br /><br />Therefore, the correct answer is:<br />**Tetralogy of Fallot**