[Table/Fig-4]:

TOF Moderate outflow obstruction.

A 21-year-old female presented with palpitations, right ventricular outflow obstruction on echocardiography diagnosed with PS; (a) Diagrammatic representation of cardiac anatomy in TOF (b) Plain radiograph shows normal cardiac size and configuration. Pulmonary arterial markings are decreased; (c) RVOT reconstructed CT; and (d) axial CT image at a slightly higher level shows severe narrowing of pulmonary infundibulum, pulmonary valve and proximal PA (arrows). RPA and LPA are relatively small; (e) Reconstructed CT view shows a large sub-aortic VSD (arrow) and large overriding aorta. There is biventricular enlargement and hypertrophy.