Which of the following represents the additional component in pentalogy of Fallot?: (A) Atrial Septal Defect (ASD), (B) Ventricular Septal Defect (VSD), (C) Right ventricular Hypertrophy (RVH), (D) Pulmonic Stenosis
Answer is A. a. Atrial Septal Defect (ASD)(Ref: Nelson's 20/e p 2211-2217, Ghai 8/e p 420-423)Pentalogy of Fallot = Tetralogy of Fallot + Atrial Septal defect.