Major cardiac defects in cattle in southern Brazil: retrospective study of necropsies over 20 years (2000-2019)

ABSTRACT: Cardiac malformations are reported to be relatively rare in bovine species, with ventricular septal defects being the most common abnormality observed predominantly young calves. This report aims describe cardiac bovids and review literature related those this species. The necropsy reports of 1,783 were reviewed, 0.4% diagnosed a congenital defect. malformation detected study was defect, alone or associated other anomalies (in one case, as part tetralogy Fallot); followed by atrial also malformations. Secondary findings lungs liver 75% all cases. Histologic lesions identified 25% cases, characterized mainly fibrosis. Other different organs Considering importance study, these conditions should considered differential diagnosis for calves who died no specific clinical signs. Furthermore, macroscopic evaluation is crucial