title: Duplication of the tricuspid valve.
abstract: Duplication of the atrioventricular (AV) valves is a rare anomaly, more commonly seen in the mitral position. Only 13 cases have been reported in the literature.(1-10) The case described here represents an unusual variant of this anomaly and provides an opportunity to review the pathology and embryologic genesis of duplication deformities of the AV valves.
authors.affiliation: Division of Thoracic and Cardiovascular Surgery, Department of Surgery, The University of Iowa Hospitals and Clinics, Iowa City, Iowa.
authors.forename: Thomas G.
authors.initials: TG
authors.lastname: Lynch
authors.forename: Donald B.
authors.initials: DB
authors.lastname: Doty