Diagnostic strategies for pulmonary arteriovenous fistula in pregnancy

Pulmonary arteriovenous malformations (PAVMs) are a documented cause of hemoptysis, and usually necessitate pulmonary angiography for a definitive diagnosis. However, the diagnosis can become more problematic in pregnancy. We recently saw a young woman in her fifth month of pregnancy with hemoptysis, who was found to have multiple PAVMs. We report this case to highlight the various non-invasive methods of making this diagnosis.