Among the features of tetralogy of Fallot (TOF), which component dictates the clinical manifestations or presence of cyanosis in patients?
degree of right ventricular outflow tract obstruction
Annotated CT images demonstrating the components of tetralogy of Fallot (TOF):
- right ventricular hypertrophy
- right ventricular outflow tract obstruction (RVOTO) in the form of infundibular stenosis
- ventricular septal defect (VSD)
- overriding aorta
A modified Blalock-Thomas-Taussig shunt is also shown connecting the innominate artery and main pulmonary artery.