Most important prognostic marker of tetralogy of fallot

NEET PG
#1

Most important prognostic marker of
tetralogy of fallot
a) VSD
b) Pulmonary stenosis
c) Overriding of aorta
d) Right ventricular hypertrophy
Correct Answer - B
Answer- B. Pulmonary stenosis
Tetrology of fallot has 4 components:

  1. Obstruction to right ventricular outflow (pulmonary stenosis),
  2. A mal-alignment type of ventricular septa] defect (VSD),
  3. Dextro position of the aorta so that it overrides the ventricular
    septum, and
  4. Right ventricular hypertrophy
    [Ref Nelson 20th le p. 2211]