A 1-month-old infant was diagnosed with truncus arteriosus (TA) ...

[kwoodring]

A 1-month-old infant was diagnosed with truncus arteriosus (TA) with a ventricular septal de-fect. This condition results in:
 
  a. hypertrophy of the aorta and major arter-ies.
  b. transposition of the aorta and the pulmo-nary trunk.
  c. the aorta returning blood to the right atrium.
  d. blood from both ventricles mixing in a common vessel.

Question 2

When the pediatrician cardiologist discusses total anomalous pulmonary venous connection, which of the following statements BEST describes this condition?
 
  a. The foramen ovale closes after birth.
  b. Pulmonary venous return is introduced into the right atrium.
  c. Pulmonary venous return is introduced into the left atrium.
  d. The foramen ovale does not close.

[lindahyatt42]

Answer to Question 1

ANS: D
TA is failure of normal separation and division of the embryonic outflow track into a pulmonary artery and an aorta, resulting in a single vessel that exits the heart. It does not involve hypertro-phy of the aorta. It does not involve transposition of the aorta. It does not involve the aorta re-turning blood to the right atrium.

Answer to Question 2

ANS: B
The pulmonary venous return is connected to the right side of the circulation, rather than to the left atrium. It does not include closure of the foramen ovale after birth.

[kwoodring]

Excellent

[recede]

Gracias!