The morphopathological pravalence of inflammatory cardiomyopathies in dogs

Abstract

The research was conducted during the period October 2013-May 2015 and it consisted of the necropsic exam of 30 dog bodies of different ages, sexes and breeds. It was completed with a microscopic exam of the histopathological preparations which were obtained from heart samples coming from 19 cases which presented lesions. Eight cases were diagnosed with inflammatory cardiomyopathies (42.09%). The diagnosed cardiac lesions, of the cases taken into study were multiple and complex, they developed in the same time or successively in several structures (pericardium, myocardium and endocardium as well as in blood vessels). They were exteriorized through pericarditis (5.26%), myocarditis (21.5%) and endocarditis (10.52%) as well as parasitic pulmonary arteritis (5.26%). Fibrinous pericarditis, chronic evolution, signaled in one of the cases was histopathologically exteriorized through the presence of fibrin networks with leukocytes and erythrocytes, attached to the swollen and infiltrated with inflammatory cells epicardium. The myocarditis which was morphopathologically identified, was represented by the parenchymatous myocarditis in one case, lymphohistiocitary myocarditis in two cases and fibrous interstitial myocarditis in one case. The endocarditis we diagnosed morphopathologically was represented by the verrucous or thrombotic endocarditis (5.26%) as well as by ulcero-polypous endocarditis (5.26%). In one case with cardiopulmonary dirofilariosis, we anatomopathologically diagnosed wormy pulmonary arteritis, expressed through lesions of several degrees, intensities and extensions of the arterial wall. They were translated through erosions of the intima as consequence of the contact with dirofilaria larvae.