Cardiac Development & Congenital Anomalies Quiz
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Questions and Answers

What causes the changes in the vascular system at birth?

  • Closure of the septum primum
  • Increase in placental blood flow
  • Cessation of placental blood flow and beginning of respiration (correct)
  • Decrease in lung vessel constriction

In complete transposition of the great blood vessels, what happens to the position of the heart apex?

  • It becomes inferior and to the right side (correct)
  • It becomes superior
  • It remains in the same position
  • It moves to the left side

Which heart defect is associated with ventricular inversion?

  • Coarctation of the aorta
  • Dextrocardia (correct)
  • Atrial septal defect
  • Patent ductus arteriosus

What causes an increase in pressure in the left atrium after birth?

<p>Closure of the oval foramen (C)</p> Signup and view all the answers

Which structure plays a role in closing the ductus arteriosus after birth?

<p>Muscular contraction of ductus arteriosus (D)</p> Signup and view all the answers

In what direction is the heart apex positioned in dextrocardia?

<p>Inferior and to the right side (A)</p> Signup and view all the answers

How does the heart tube form during embryological development?

<p>It develops from two primitive heart tubes that fuse together in a craniocaudal direction. (B)</p> Signup and view all the answers

What is the significance of the craniocaudal fusion of the heart tubes during development?

<p>It enables the establishment of correct blood flow direction within the heart. (A)</p> Signup and view all the answers

In the context of cardiac development, how is complete transposition of the great blood vessels explained embryologically?

<p>It involves abnormal positioning of the aorta and pulmonary arteries during development. (C)</p> Signup and view all the answers

How does fetal circulation change after birth and relate to congenital heart defects?

<p>Fetal circulation transitions to newborn circulation patterns involving permanent closure of certain shunts. (B)</p> Signup and view all the answers

Which clinical syndrome affecting the heart is most likely associated with generalized cyanosis shortly after birth?

<p>Tetralogy of Fallot (C)</p> Signup and view all the answers

Why was the infant with complete transposition of great blood vessels able to survive after birth despite having this severe anomaly?

<p>The presence of an open ductus arteriosus provided a temporary shunt for mixing blood. (A)</p> Signup and view all the answers

What causes the closure of the communication between the two atria at birth?

<p>Increase in left atrial pressure (B)</p> Signup and view all the answers

Which of the following conditions is associated with the aorta originating from the right ventricle and the pulmonary artery originating from the left ventricle?

<p>Transposition of the great vessels (B)</p> Signup and view all the answers

Which abnormality involves anterior displacement of the spiral septum and includes pulmonary stenosis and overriding of the aorta?

<p>Tetralogy of Fallot (B)</p> Signup and view all the answers

What is primarily found in the muscular portion of the interventricular septum?

<p>Ventricular septal defects (B)</p> Signup and view all the answers

Which defect is usually accompanied by an open ductus arteriosus and may involve a defect in the membranous part of the interventricular septum?

<p>Patent ductus arteriosus (D)</p> Signup and view all the answers

What leads to hypertrophy of the right ventricular wall in Tetralogy of Fallot?

<p>Pulmonary stenosis (B)</p> Signup and view all the answers

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