Truncus arteriosus

Q ) Which of the following statements about truncus  arteriosus is false?
A. Most infants do well without operations until late childhood.
B. Cyanosis is a late feature
C. Most infants present with congestive heart failure.
D. Repair requires a conduit from right ventricle to pulmonary arteries.

Answer 

In Truncus arteriosus there is a single arterial trunk arising from the ventricles, with single dysplastic valve with

semilunar leaflets and a subvalvular VSD..

Untreated, most infants  do not survive beyond 6 months. Cyanosis is usually not present early, because mixing
mainly occurs at VSD level and the arterial oxygen saturation is generally greater than  85%, but............Read on 

COA- Coarctation of Aorta

Q) Not A complication of untreated coarctation of aorta
a) Endocarditis
b) CVA
c) Congestive heart failure
d) Pulmonary vascular disease


Coarctation of aorta is narrowing that diminishes the aortic lumen and produces an obstruction to the
flow of blood. In untreated patients complications might develop like endocarditis that occur at sites of
turbulent blood flow which is the site of narrowing,..........

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