Essential criteria for TOF includes all except: (A) Valvular stenosis, (B) Infundibular stenosis, (C) Over riding of aoa, (D) RVH
Answer is A. The four components of the tetralogy of Fallot are malaligned VSD, obstruction to RV outflow, aoic override of the VSD, and RV hyperophy due to the RV's response to aoic pressure the large VSD. ( Harrison&;s principle of internal medicine,18th edition,pg no. 1926 )