Cardiac Valve Myxosarcoma with Thrombosis of the Right Coronary Artery in a Dog

Left ventricular cardiac myxoma and sudden death in a dog

“…Myocardial hypoxia might have been present as a consequence of obstruction of a coronary artery by the mass. In a similar case to our own, sudden death was described in a dog with a myxosarcoma, which caused left ventricular outflow tract obstruction, however, in this case the tumor was malignant [ 21 ].…”

“…The most common primary cardiac neoplasia is hemangiosarcoma, followed by aortic body tumor (chemodectoma) [ 3 , 9 ]. Other types of cardiac tumors, such as malignant lymphoma and mesothelioma, are very rare in the dog [ 2 – 9 , 17 – 21 ]. Most often, cardiac tumors lead to pericardial effusion and subsequently to cardiac tamponade, which may result in ascites through splanchnic congestion, or to exercise intolerance, syncope or shock through low cardiac output [ 3 , 9 ].…”

“…Most often, cardiac tumors lead to pericardial effusion and subsequently to cardiac tamponade, which may result in ascites through splanchnic congestion, or to exercise intolerance, syncope or shock through low cardiac output [ 3 , 9 ]. Less commonly, mass effect of the tumor leads to syncope or to pulmonary or splanchnic congestion by obstructing blood flow either due to intraluminal tumor growth or external compression of cardiac structures or great vessels [ 2 – 9 , 17 – 21 ]. Infiltrative tumor growth may result in systolic dysfunction of a ventricle [ 9 ].…”