Pericardial effusion complicating swine origin influenzae A (H1N1) infection in a 50-year-old woman.

Acute pericarditis is a well-recognized but rare complication of numerous viral infections. We report a case of a 50-year-old woman with novel influenza A (H1N1) infection complicated by pericardial effusion. Resolution of both symptoms and pericardial effusion occurred after a treatment with oseltamivirin and ibuprofen.