Which of the following does not complicate into CHF –
(A) Co–relation of aorta (B) Transposition of great vessels (C) Tetralogy of fallot's (D) Patent ductus arteriorus
(C) The ventricular septal defect of TOF is always large enough to allow free exit to the right to left shunt.
Since the right ventricle is effectively decompressed by VSD, Congestive cardiac failure never occurs in TOE
Exceptions to this rule are : -


Anemia                                                                                                     
Infective endocarditis

iii) Systemic hypertension
iv) Myocarditis complicating TOF
V) Aortic or pulmonic regurgitation.

Remember:
Following do not occur in TOF -->       o Cardiomegaly          o CHF              o Recurrent chest infections