The most common presentation of double aoic arch in infants is ?
**Core Concept**
Double aortic arch is a congenital anomaly characterized by the presence of a second aortic arch that encircles the trachea and esophagus, leading to respiratory and gastrointestinal symptoms. This anomaly occurs due to the failure of regression of the right dorsal aortic root during embryonic development.
**Why the Correct Answer is Right**
The most common presentation of double aortic arch in infants is respiratory distress, which is often accompanied by feeding difficulties and stridor. This occurs due to the compression of the trachea and esophagus by the double aortic arch, leading to impaired breathing and swallowing. The compression of the trachea can also lead to tracheomalacia, which further exacerbates respiratory symptoms.
**Why Each Wrong Option is Incorrect**
* **Option A:** Cyanosis is not a typical presentation of double aortic arch in infants, as the primary issue is compression of the trachea and esophagus, rather than hypoxia.
* **Option B:** Dysphagia is a possible presentation, but it is not the most common symptom in infants.
* **Option D:** Cardiac failure is not a direct result of double aortic arch, although it may occur in some cases due to associated congenital heart defects.
**Clinical Pearl / High-Yield Fact**
Double aortic arch is often associated with other congenital anomalies, such as cardiac defects, tracheoesophageal fistula, and esophageal atresia. A high index of suspicion and prompt imaging studies are essential for diagnosis and management.
**Correct Answer: C. Respiratory distress.**