Tetralogy of Fallot is a congenital condition of heart characterized by: 1. Overriding aorta 2. Right ventricular hypertrophy 3. Ventricular septal defect 4. Pulmonary stenosis Right ventricular hypertrophy in tetralogy of Fallot gives heart a characteristic appearance on chest radiograph i.e., boot shaped heart. Reference: https://radiopaedia.org/articles/boot-shaped-heart-2 Image via: https://radiopaedia.org/articles/boot-shaped-heart-2