Atrial Septation — Cardiovascular Development

Atrial Septation MCQs: practice questions

Sample Atrial Septation multiple-choice questions from Cardiovascular Development.

1. Which atrial septal defect is the most common in the source?

   • A. Foramen secundum defect
   • B. Foramen primum defect
   • C. Coronary sinus defect
   • D. Common AV canal
   • E. Sinus venosus defect

2. What is the direction of fetal blood flow through the foramen ovale?

   • A. Left atrium to right atrium
   • B. Right atrium to left atrium
   • C. Pulmonary trunk to aorta
   • D. Right ventricle to left ventricle
   • E. Left ventricle to right ventricle

3. Which defect is most directly related to excessive resorption of septal tissue in atrial septation?

   • A. Persistent truncus arteriosus
   • B. Tetralogy of Fallot
   • C. Foramen secundum defect
   • D. Muscular VSD
   • E. Ebstein anomaly

4. Where does the foramen secundum develop?

   • A. Within the sinus venosus
   • B. Within the AV cushions
   • C. Within the bulbus cordis
   • D. Within the septum secundum
   • E. Within the septum primum

5. Which structure is derived from the sinus venosus and lies in the posterior right atrioventricular region?

   • A. Pulmonary trunk
   • B. Left atrial appendage
   • C. Conus arteriosus
   • D. Coronary sinus
   • E. Aortic vestibule

6. What is a foramen secundum atrial septal defect associated with?

7. What opening is bounded by the upper and lower limbs of the septum secundum?

8. What immediately changes pulmonary venous return after birth?

9. How does the foramen primum close?

10. Which septal structure is positioned on the right side of septum primum?

11. Which fetal cardiac chamber receives the most direct venous inflow from the venae cavae?

12. What opening initially lies between the septum primum and AV cushions?

13. Where does the septum secundum develop relative to the septum primum?

14. What is the main functional role of the fetal foramen ovale?

15. What replaces the foramen primum as the route for interatrial flow before birth?

16. What causes the fall in right atrial pressure after birth?

17. Which embryonic structure separates the atria but retains an interatrial opening during fetal life?

18. What is the developmental purpose of the foramen secundum?

19. Which fetal atrial pressure relationship keeps the foramen ovale functionally open?

20. What is the first major structure formed during atrial septation?

21. Which embryonic opening is present before the foramen ovale develops?

22. Where does the septum primum grow?

23. What adult structure is formed by incorporation of the sinus venosus into the right atrium?

24. What is a persistent patent foramen ovale?

25. What pressure change facilitates functional closure of the foramen ovale after birth?

26. What completes the definitive atrial septum later in life?

27. Which primitive heart dilation forms the trabeculated atrial appendages?

28. What structure forms the smooth part of the left atrium?

29. What structure marks the junction between smooth and trabeculated right atrial regions?

30. What happens anatomically to the septum primum and septum secundum later in life?