title: Misleading hyperoxia test.
abstract: A 2 day old infant with infracardiac total anomalous pulmonary venous connection achieved an arterial oxygen tension greater than 250 mmHg, breathing 100% oxygen. Diagnosis of cardiac disease was delayed several weeks. The anatomical basis for this phenomenon was streaming of systemic venous return across an inferior vena cava type atrial septal defect.
mesh_terms: D003330:Coronary Vessel Anomalies / Q000175:diagnosis; D005260:Female; D006330:Heart Defects, Congenital / Q000175:diagnosis* / Q000503:physiopathology; D006801:Humans; D007231:Infant, Newborn; D010100:Oxygen / Q000097:blood; D010313:Partial Pressure
chemical_list: D010100:Oxygen