Two adult patients with patent ductus arteriosus (PDA), resulting in Eisenmenger's syndrome, were evaluated by computed tomography and Magnetic Resonance imaging of the chest, which clearly demonstrated the patent arterial duct as well as the morphologic features of long-standing pulmonary arterial hypertension. Massively dilatated, calcified pulmonary arteries were seen, and the arterial duct was identified as a vascular channel between the distal aortic arch and the main pulmonary artery.
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