Aortic arch defects

Aortic arch defects (also known as aortic arch anomalies or aortic arch malformations) encompass a group of congenital cardiovascular malformations affecting the aortic arch, which is the curved portion of the main artery that carries oxygenated blood from the heart to the rest of the body. These defects arise from abnormal development of the pharyngeal arch arteries during embryogenesis and include conditions such as interrupted aortic arch, double aortic arch, right aortic arch, cervical aortic arch, and coarctation of the aorta. The aortic arch is critical for delivering blood to the head, neck, arms, and the descending aorta supplying the rest of the body, so malformations can have significant hemodynamic consequences. Clinical presentation varies depending on the specific type and severity of the defect. Interrupted aortic arch, one of the most severe forms, typically presents in the neonatal period with signs of cardiovascular collapse, poor perfusion, and heart failure once the ductus arteriosus closes. Vascular ring anomalies such as double aortic arch may cause compression of the trachea and esophagus, leading to stridor, difficulty breathing, dysphagia, and recurrent respiratory infections. Some milder forms, such as certain right aortic arch variants, may be asymptomatic and discovered incidentally. Aortic arch defects may occur in isolation or in association with other congenital heart defects, and some are strongly associated with chromosomal abnormalities, particularly 22q11.2 deletion syndrome (DiGeorge syndrome). Treatment is primarily surgical and depends on the specific anomaly. Neonates with interrupted aortic arch require urgent surgical repair, often with prostaglandin E1 infusion to maintain ductal patency prior to surgery. Vascular rings typically require surgical division to relieve airway and esophageal compression. Coarctation of the aorta may be treated surgically or with catheter-based interventions. Long-term follow-up with a cardiologist is essential, as patients may develop complications such as re-coarctation, hypertension, or aneurysm formation. Genetic counseling is recommended, especially when associated syndromic features are present.

Data sourced from FDA regulatory filings and ClinicalTrials.gov. Updated periodically.

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