New Zealand Obstetric Ultrasound Guidelines 2019

The left subclavian artery will be arising from the ductus arteriosus (in type B). There may be an aberrant right subclavian artery coursing posterior to the trachea. Associations. Other cardiac anomalies, particularly VSD (in 90 percent of cases), right-sided aortic arch and aberrant subclavian arteries. Other associated cardiac anomalies ... ................
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