A large type I right pulmonary artery to left atrium fistula: underwent successful percutaneous device closure with duct occluder-a rare case report.

Background: Pulmonary artery to left atrium fistula is an unusual structural cause of silent cyanosis. Only less than 100 cases have been reported so far. A high index of clinical suspicion and proper evaluation with bubble contrast echocardiography and cardiac computed tomography (CT) will help to detect this treatable anomaly.