<prompt> Essential criteria for TOF includes all, EXCEPT:Valvular stenosisInfundibular stenosisOver riding of aoaRVH  <response>: 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, Hursts The Hea, 13e. 