title: Circular shunt in a pulmonary artery to right atrial tunnel, an anomaly unreported so far.
abstract: While aortico-right atrial tunnels with left to right shunt from aorta to right atrium are reported widely, pulmonary artery to right atrial tunnels have not been described so far. Such a tunnel will lead to a circular shunt with a recirculation of blood in the right sided cardiac chambers repeatedly bypassing the pulmonary capillary bed. This newly described pulmonary artery to right atrial tunnel was closed nonsurgically with a duct occluder after angiographic delineation.
authors.affiliation: Department of Pediatric Cardiology, Madras Medical Mission, Mogappair, Chennai, India.
authors.forename: Anil Kumar
authors.initials: AK
authors.lastname: Singhi
authors.affiliation: Department of Pediatric Cardiology, Madras Medical Mission, Mogappair, Chennai, India.
authors.forename: Kothandam
authors.initials: K
authors.lastname: Sivakumar
keywords: Circular shunt; device closure; pulmonary artery to right atrium tunnel