Question
Right sided aortic arch is more commonly associated with:
| A. |
Tetralogy of Fallot (TOF)
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| B. |
Ventricular Septal Defect (VSD) with pulmonary atresia
|
| C. |
Corrected Transposition of great arteries (TGA)
|
| D. |
Truncus arteriosus
|
Show Answer
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Correct Answer » A
Explanation
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|
- Right-sided aortic arch is a congenital anomaly resulting from persistence of the right fourth aortic arch.
- It is classically associated with conotruncal cardiac anomalies.
- The most common congenital heart disease associated with a right-sided aortic arch is Tetralogy of Fallot (TOF).
- Approximately 20–30% of patients with TOF have a right-sided aortic arch.
- The uploaded notes identify Tetralogy of Fallot as the most common association of right-sided aortic arch.
Explanation of Other Options
B. Ventricular Septal Defect (VSD) with Pulmonary Atresia
- May be associated with a right-sided aortic arch.
- Association is less common than in TOF.
- Not the best answer.
C. Congenitally Corrected Transposition of the Great Arteries (ccTGA)
- Right-sided aortic arch is uncommon.
- Characterized mainly by atrioventricular and ventriculoarterial discordance.
D. Truncus arteriosus
- Right-sided aortic arch is also associated with persistent truncus arteriosus.
- One of the uploaded review books states that it is the lesion “most strongly associated” with a right-sided aortic arch.
- However, for standard examination questions asking “more commonly associated,” the accepted answer is Tetralogy of Fallot.
