Japanese Journal of Veterinary Research;Volume 34, Number 3-4

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ECHOCARDIOGRAPHIC DETECTION OF BOVINE CARDIAC DISEASES

YAMAGA, Yoshinori;TOO, Kimehiko

Permalink : http://hdl.handle.net/2115/3022
JaLCDOI : 10.14943/jjvr.34.3-4.251
KEYWORDS : M-mode and two-dimensional echocardiography;bovine dilated cardiomyopathy;chronic large abscesses of the pericardium;bovine leukemia

Abstract

Cows with dilated (congestive) cardiomyopathy, chronic large abscesses of the pericardium and bovine leukemia were examined using echocardiography to determine its diagnostic capacities. M-mode echocardiographic data from 15 normal Holstein cows were collected to evaluate abnormalities associated with three cases. Case 1 with dilated cardiomyopathy was grossly characterized by dilatation of all four cardiac cavities and poor ventricular function. Case 2 showed large pericardial abscesses accompanied by cardial atrophy echocardiographically. For the purpose of the differential diagnosis, drainage from both thoracic cavities and biopsy of the lump within the abscess were performed and securely done under ultrasound guidance. Case 2 could be differentiated from dilated cardiomyopathy and traumatic pericarditis by echocardiography. The echocardiographic features of case 3 were strikingly symmetrical thickened ventricular walls due to leukemic infiltration of the myocardium. Cases 1 and 2 were characterized by an abnormal mitral closure on the M-mode echocardiogram indicative of an elevated left ventricular end-diastolic pressure. Echocardiographic findings reflected grossly pathological findings. By echocardiographic measurement, the left ventricular wall thickness at the end-systole of each case did not differ from that by necropsy measurement. Echocardiography was found to be an accurate technique for obtaining pathophysiological information on bovine cardiac diseases.

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