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1 From the Department of Radiology, University of Minnesota Hospitals, Minneapolis, Minnesota
Atrial septal defects are usually of large magnitude and result in marked enlargement of the pulmonary arteries.
Fourteen cases of proven atrial septal defect with large shunts, normal heart size and vasculature are reported.
A negative chest roentgenogram and a normal cardiac fluoroscopy do not exclude the presence of a large left-to-right shunt at the atrial level.
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