Cardiac Case Study A 10-month-old girl was admitted to the hospital for cardiac catheterization. Her history included cyanosis noted at about 6 weeks of age, increasing over the last 7 months and becoming more severe with crying or physical activity. A presumptive diagnosis of tetralogy of Fallot (TOF) was made on admission. 1. What is tetralogy of Fallot (TOF)? Four defects that result in mixed blood flow: Pulmonary stenosis, ventricular septal defect, overriding aorta, right ventricular hypert...