Pulmonary arteriovenous malformation
 Discussion of Pulmonary arteriovenous malformation
- A pulmonary arteriovenous malformation (PAVM) is an abnormal connection between a branch of a pulmonary artery and a pulmonary vein through a thin-walled aneurysmal sac.
- PAVMs are most commonly congenital in nature and have a strong relationship with the syndrome of hereditary hemorrhagic telangiectasia (HHT).
- PAMVs act as direct right-to-left shunts and result in dyspnea, fatigue, cyanosis, and/or polycythemia when the shunt is large.
- Because the PAVM bypasses the capillary bed, the lung loses its filter function, and, thus, paradoxical emboli and bacteria are able to pass directly into the systemic circulation, with the result being stroke or cerebral abscess.
- Selective embolization is the first-line procedure for the treatment of these malformations and leads to immediate occlusion of the PAVM in 90%–100% of cases and to continued occlusion 1 year after the procedure in more than 80% of cases.
 Imaging Findings for Pulmonary arteriovenous malformation
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 References for Pulmonary arteriovenous malformation
- Pierre-Yves Brillet, Philippe Dumont, Nébil Bouaziz, Alain Duhamel, François Laurent, Jacques Remy, and Martine Remy-Jardin. Pulmonary Arteriovenous Malformation Treated with Embolotherapy: Systemic Collateral Supply at Multidetector CT Angiography after 2–20-year Follow-up. Radiology 2006 242: 267-276.
- Martine Remy-Jardin, Philippe Dumont, Pierre-Yves Brillet, Philippe Dupuis, Alain Duhamel, and Jacques Remy. Pulmonary Arteriovenous Malformations Treated with Embolotherapy: Helical CT Evaluation of Long-term Effectiveness after 2–21-Year Follow-up. Radiology 2006 239: 576-585.