Right Atrial Thrombosis in a Cat with Protein-losing Nephropathy

Abstract

A four-year-old spayed mixed-breed cat was referred for dyspnea and edema. A right atrial thrombosis was detected by echocardiography. Blood and urine analyses revealed hypoalbuminemia and severe proteinuria. A blood coagulation test showed a decrease in AT (antithrombin) III activity. The patient died four days after admission to the hospital. Histopathological examination revealed endocarditis, membranous glomerulonephritis and thrombosis in the pulmonary arteries as well as in the right atrium. On the basis of these findings, proteinlosing nephropathy might have been the cause of the formation of the right atrial thrombosis.