Anomalies of the Interventricular Septum (VSD)
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Questions and Answers

What is the purpose of the foramen ovale during fetal development?

  • To allow blood to flow from the left atrium to the right atrium (correct)
  • To allow blood to flow from the left ventricle to the right ventricle
  • To allow blood to flow from the right ventricle to the left ventricle
  • To allow blood to flow from the right atrium to the left atrium

    • Which of the following is the most accurate description of the septum secundum?

  • A C-shaped septum that arises from the roof of the common atrium on the left side of the septum primum
  • A C-shaped septum that arises from the floor of the common atrium on the right side of the septum primum
  • A C-shaped septum that arises from the floor of the common atrium on the left side of the septum primum
  • A C-shaped septum that arises from the roof of the common atrium on the right side of the septum primum (correct)

    • What is the significance of a patent foramen ovale?

  • It allows blood to flow from the right ventricle to the left ventricle even after birth
  • It allows blood to flow from the right atrium to the left atrium even after birth (correct)
  • It allows blood to flow from the left ventricle to the right ventricle even after birth
  • It allows blood to flow from the left atrium to the right atrium even after birth

    • What is the primary cause of a trilocular heart?

    <p>Failure of development of the interatrial septum</p> Signup and view all the answers

    Which of the following is the MOST CORRECT description of the development of the interventricular septum?

    <p>The interventricular septum is formed by the failure of development of the membranous part of the septum only.</p> Signup and view all the answers

    What is the role of the bulbar ridges in the development of the heart?

    <p>They divide the bulbus cordis into the anterior and posterior parts</p> Signup and view all the answers

    What is the MOST LIKELY cause of transposition of the greater vessels (TGA)?

    <p>Failure of the aortico-pulmonary septum to spiral.</p> Signup and view all the answers

    What is the primary function of the cardiogenic plate during heart development?

    <p>To form the heart tubes</p> Signup and view all the answers

    What is the MOST LIKELY cause of a persistent truncus arteriosus (PTA)?

    <p>Failure of development of the aortico-pulmonary septum.</p> Signup and view all the answers

    Which of the following is the MOST ACCURATE description of Fallot's Tetralogy (FT)?

    <p>FT is characterized by pulmonary stenosis, right ventricular hypertrophy, overriding of the aorta, and ventricular septal defect.</p> Signup and view all the answers

    What is the MOST LIKELY cause of a complete absence of the interventricular septum?

    <p>Failure of development of both the membranous and muscular parts of the septum.</p> Signup and view all the answers

    Which of the following is the MOST ACCURATE description of the development of the truncus arteriosus (TA)?

    <p>The TA develops from two ridges that appear in the cephalic part of the TA, which then grow and fuse to form the spiral aortico-pulmonary septum.</p> Signup and view all the answers

    What is the structure that forms septum intermedium which divides the atrioventricular canal into right and left halves?

    <p>Both ventral and dorsal endocardial cushions</p> Signup and view all the answers

    Which part of the atrioventricular (A-V) canal corresponds to the tricuspid and mitral valves?

    <p>Upper</p> Signup and view all the answers

    What embryological component forms the smooth part of the left atrium?

    <p>Left half of the primitive atrium (auricle)</p> Signup and view all the answers

    What is the descending C-shaped septum that leaves an opening below called the ostium primum?

    <p>Septum primum</p> Signup and view all the answers

    Which structure descends from the roof of the common atrium towards the septum intermedium forming the ostium secundum?

    <p>Septum primum</p> Signup and view all the answers

    Which part of the heart tube contributes to forming the interventricular septum (membranous part)?

    <p>Left atrium</p> Signup and view all the answers

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