Cyanotic Congenital Heart Diseases (Part 2)%u2022 Tetralogy of Fallot:%u2022 Four key features:%u2022 Pulmonary stenosis%u2022 Right ventricular hypertrophy%u2022 Overriding of aorta%u2022 VSD%u2022 X-ray: Boot-shaped heart%u2022 Clinical: Squatting spells