“…The Dogue de Bordeaux (DdB) is a large brachycephalic breed of dog, originating in France. The population and cardiac pathology of DdB in the United A C C E P T E D M A N U S C R I P T Kingdom (UK) has not been well described; however, anecdotal reports suggest that atrial fibrillation (AF) is prevalent in this breed and a recent study suggested that the breed may have a high incidence of sudden and unexpected death (McAulay et al, 2018). The DdB is affected by a range of cardiac conditions, including subaortic stenosis (SAS), tricuspid dysplasia and dilated cardiomyopathy (DCM) (Borgarelli et al, 2006;Höllmer et al, 2008;Martin et al, 2009;Oliveira et al, 2011;Ohad et al, 2013).…”