Anomalous (Nonconstricting) Left Pulmonary Artery

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Abstract
Anomalous nonconstricting left pulmonary arteries are rare. Only 2 cases have been encountered among several thousand patients who have had angiocardiography at this center. In contrast to the alarming respiratory symptoms of dyspnea, stridor, and recurrent pulmonary infections in patients with constricting pulmonary ring lesions, the patients herein reported were asymptomatic and referred because of unusual left hilar vascular shadows discovered after routine roentgenography of the chest. One patient had associated thoracic hemivertebrae and a single-lobed left lung. The other patient had a fleck of calcium at the origin of the left pulmonary artery probably owing to calcification of the remnant of the 6th aortic arch.