Abstract
Two children referred for cardiac imaging were found to have an unusual form of a vascular ring. The first patient was an asymptomatic 10-year-old girl with a membranous ventricular septal defect, prolapse of the right coronary aortic cusp, and mild aortic regurgitation. Her past history was notable for gastroesophageal reflux disease as an infant, which had prompted a barium swallow at a few months of age demonstrating a posterior compression defect on the esophagus. Detailed imaging of the thoracic vasculature was not pursued at the time given the lack of respiratory symptoms and resolution of her reflux. She was now referred for cardiac magnetic resonance imaging to quantify the degree of left-to-right shunt, aortic regurgitation, and left ventricular dilation. Cardiac magnetic resonance demonstrated a small membranous ventricular septal defect with pulmonary-to-systemic flow ratio of 1.2, mild aortic regurgitation, and a mildly dilated left ventricle with normal systolic function. A right aortic arch was incidentally detected with branches arising in the following order: proximal to distal: right common carotid artery, right subclavian artery, and left innominate artery. The left innominate artery originated from a …
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