Retrospective evaluation of clinical signs, clinical course, and prognosis between dogs with left atrial rupture secondary to myxomatous mitral valve disease and those with neoplastic cardiac tamponade (2015-2019): 70 cases.

Objective: To describe the clinical signs, clinical course, and prognosis of suspected left atrial rupture (LAR) secondary to myxomatous mitral valve disease (MMVD) in dogs and to compare them with dogs with suspected neoplastic cardiac tamponade (NCT).

Design: Retrospective study from November 2015 to October 2019 SETTING: An out-of-hours Emergency Animal Hospital.

Animals: Twenty-three dogs with LAR secondary to MMVD (LAR group) and 47 dogs with NCT (NCT group).