title: Stent placement for palliation of cor triatriatum dexter in a dog with suspected patent foramen ovale.
abstract: An 11 month old spayed, female dog presented with exercise intolerance and cyanosis upon exertion. Echocardiography revealed an imperforate cor triatriatum dexter with mild tricuspid valve dysplasia, an underfilled right ventricle and significant right to left shunting across a presumptive patent foramen ovale. Balloon dilation of the abnormal atrial membrane was initially successful in creating a communication between the right atrial chambers, but stenosis of the original perforation and persistent clinical signs prompted a second intervention. A balloon expandable biliary stent was placed across the abnormal partition, improving caudal venous return to the right ventricle and reducing the right to left shunt. Three months after stent placement, resting oxygen saturation had normalized. Six months after stent placement, exercise tolerance had improved and exertional cyanosis had resolved. Long term follow up will be necessary to assess for remodeling of the right ventricle with improved venous return. Stent placement can be considered as a palliative treatment option for cor triatriatum dexter, especially for stenosis post-balloon dilation.
authors.affiliation: Veterinary Medical Center, University of Minnesota, 1365 Gortner Ave, St. Paul, MN 55108, USA. Electronic address: kbarncor@umn.edu.
authors.forename: Kristin
authors.initials: K
authors.lastname: Barncord
authors.affiliation: Veterinary Medical Center, University of Minnesota, 1365 Gortner Ave, St. Paul, MN 55108, USA.
authors.forename: Christopher
authors.initials: C
authors.lastname: Stauthammer
authors.affiliation: School of Medicine - Radiology, University of Minnesota, 420 Delaware St SE, Minneapolis, MN 55455, USA.
authors.forename: Sean L
authors.initials: SL
authors.lastname: Moen
authors.affiliation: Veterinary Medical Center, University of Minnesota, 1365 Gortner Ave, St. Paul, MN 55108, USA.
authors.forename: Melissa
authors.initials: M
authors.lastname: Hanson
authors.affiliation: School of Medicine - Cardiology, University of Minnesota, 420 Delaware St SE, Minneapolis, MN 55455, USA.
authors.forename: Daniel H
authors.initials: DH
authors.lastname: Gruenstein
mesh_terms: D000818:Animals; D003310:Cor Triatriatum / Q000628:therapy / Q000662:veterinary*; D004283:Dog Diseases / Q000628:therapy*; D004285:Dogs; D054092:Foramen Ovale, Patent / Q000662:veterinary*; D010166:Palliative Care; D015607:Stents / Q000662:veterinary*
keywords: Angiography; Cardiac anomalies; Congenital heart disease; Echocardiography