Insuficiência cardíaca aguda do lado esquerdo, bovino

The entire lung is grossly enlarged in this bovine necropsy sample, with impressions of the ribs visible. Intralobular spaces are apparent, suggesting pulmonary edema. With left-sided cardiac failure from Histophilus somni–induced myocardial infarction in the papillary muscle, pulmonary congestion and edema result, as shown here.