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). Interventions None. Measurements and Main Results The following were the characteristics of the study population (LAR group vs NCT groups) with P