title: Marked pleural effusion causing right atrial collapse simulating cardiac tamponade in a dog.
abstract: A 16-month-old, female German shepherd dog was presented with severe bicavitary effusions. A diaphragmatic hernia was diagnosed by thoracic radiography. An echocardiogram performed prior to surgical repair of the hernia revealed signs of cardiac tamponade, with right atrial collapse, in the absence of pericardial effusion. Right atrial collapse was presumed to be secondary to severe pleural effusion. At surgery, no pericardial disease was identified. Surgical correction of the diaphragmatic hernia resulted in resolution of the pleural and peritoneal effusions. Follow-up echocardiography demonstrated resolution of the signs of cardiac tamponade.
authors.affiliation: Section of Small Animal Surgery, Department of Clinical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, New York 14853, USA.
authors.forename: Amy A
authors.initials: AA
authors.lastname: Little
authors.forename: Michele
authors.initials: M
authors.lastname: Steffey
authors.forename: Marc S
authors.initials: MS
authors.lastname: Kraus
mesh_terms: D000818:Animals; D016280:Atrial Function, Right; D002305:Cardiac Tamponade / Q000000981:diagnostic imaging / Q000209:etiology / Q000662:veterinary*; D004283:Dog Diseases / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery*; D004285:Dogs; D004452:Echocardiography / Q000662:veterinary; D005260:Female; D006548:Hernia, Diaphragmatic / Q000150:complications / Q000000981:diagnostic imaging / Q000601:surgery / Q000662:veterinary*; D008099:Liver / Q000473:pathology; D019152:Paracentesis / Q000662:veterinary; D010996:Pleural Effusion / Q000150:complications / Q000209:etiology / Q000601:surgery / Q000662:veterinary*; D013902:Radiography, Thoracic / Q000662:veterinary; D016896:Treatment Outcome