title: What is your diagnosis? Pericardial effusion with a clot in the pericardial space likely caused by left atrial rupture secondary to mitral regurgitation.
authors.affiliation: Department of Veterinary Clinical Medicine, College of Veterinary Medicine, University of Illinois, Urbana, IL 61802, USA.
authors.forename: Robert
authors.initials: R
authors.lastname: Prosek
authors.forename: D David
authors.initials: DD
authors.lastname: Sisson
authors.forename: Mark A
authors.initials: MA
authors.lastname: Oyama
mesh_terms: D000818:Animals; D001777:Blood Coagulation; D003937:Diagnosis, Differential; D004283:Dog Diseases / Q000000981:diagnostic imaging* / Q000209:etiology; D004285:Dogs; D018618:Echocardiography, Doppler, Color / Q000662:veterinary; D017809:Fatal Outcome; D006341:Heart Rupture / Q000150:complications / Q000000981:diagnostic imaging / Q000662:veterinary; D008297:Male; D008944:Mitral Valve Insufficiency / Q000150:complications / Q000000981:diagnostic imaging / Q000662:veterinary; D010490:Pericardial Effusion / Q000000981:diagnostic imaging / Q000209:etiology / Q000662:veterinary*