Essential criteria for TOF includes all, EXCEPT:
ToF is the most common cyanotic congenital hea malformation and one of the first complex lesions to be successfully repaired. ToF occurs in 7% to 10% of children with CHD. The four characteristic findings in ToF are (1) a malaligned VSD, (2) RV outflow or pulmonary valve or aery stenosis or atresia, (3) a dextroposed overriding aoa, and (4) RV hyperophy. Valvular stenosis is not a essential criteria for TOF. Ref: Aboulhosn J.A., Child J.S. (2011). Chapter 84. Congenital Hea Disease in Adults. In V. Fuster, R.A. Walsh, R.A. Harrington (Eds), Hurst's The Hea, 13e.
Valvular stenosis
Infundibular stenosis
Over riding of aoa
RVH