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  • Title: A case of diffuse pulmonary arteriovenous fistula.
    Author: Hirata K, Yamagishi H, Akioka K, Yoshiyama M, Toda I, Teragaki M, Takeuchi K, Yoshikawa J.
    Journal: Jpn Circ J; 1999 Jun; 63(6):499-501. PubMed ID: 10406594.
    Abstract:
    A 30-year-old Japanese woman was admitted to hospital for dyspnea. She had a history of corrective surgery for a large atrial septal defect and partial anomalous pulmonary venous drainage, which had produced cyanosis in her infancy. However, her cyanosis continued postoperatively. Angiography revealed a double inferior vena cava (IVC), with the left IVC connected with the hemiazygos vein and the right IVC with the left atrium through a very small orifice. Most of the blood from the 2 IVCs flowed into the superior vena cava via the distended azygos and hemiazygos veins. Pulmonary arteriography revealed no abnormal structures. Pulmonary arterial pressure was normal. There was marked pulmonary venous oxygen desaturation. Perfusion lung scintigraphy revealed multiple segmental perfusion defects. These findings suggested the presence of diffuse microscopic pulmonary arteriovenous fistulas bilaterally in the lungs. The patient appears to be the first reported adult case of microscopic and diffuse arteriovenous fistulas. Neither resection of the arteriovenous fistulas nor corrective surgery for the diversion was indicated, and heart-lung transplantation might be the only treatment able to relieve her dyspnea.
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