CAMRT Radiography Practice Exam

Which of the following is NOT a component of Tetralogy of Fallot?

1. Ventricular septal defect (VSD)

2. Left pulmonary valve stenosis

3. Displaced aorta

4. Right ventricular hypertrophy

The correct answer is: Left pulmonary valve stenosis

The correct choice indicating a component not associated with Tetralogy of Fallot is the stenosis of the left pulmonary valve. Tetralogy of Fallot is a congenital heart defect characterized by four specific anatomical abnormalities. These are: 1. **Ventricular septal defect (VSD)** – This is a hole between the left and right ventricles of the heart, allowing oxygen-rich and oxygen-poor blood to mix. 2. **Pulmonary outflow tract obstruction** – Typically involves narrowing or stenosis, which usually occurs at the level of the right ventricular outflow tract, just before the pulmonary valve. When discussing Tetralogy of Fallot, this obstruction usually involves the right ventricular outflow tract rather than the left pulmonary valve. 3. **Overriding aorta** – In the context of this condition, the aorta is positioned directly over the ventricular septal defect and straddles both the left and right ventricles. 4. **Right ventricular hypertrophy (RVH)** – This refers to the thickening of the muscular walls of the right ventricle due to the increased workload caused by the defect. Therefore, while the other options describe elements directly involved in the pathophysiology of Tetralogy