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Pulmonary Arteriovenous Malformation

Pulmonary Arteriovenous Malformation

A pulmonary arteriovenous malformation is an abnormal connection between an artery and a vein within the lungs that allows deoxygenated venous blood to pass directly into the system circulation.

Orthodeoxia

Orthodeoxia occurs when oxygen desaturation is seen in the upright position and improves while supine.