<prompt> Component of Fallots tetralogy isLeft axis detionLeft ventrucular hyperophyVSDBlalock taussig shunt is between pulmonary aery subclan aery  <response>: 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 RVs response to aoic pressure the large VSD. Harrison;s principle of internal medicine,18th edition,pg no. 1926 