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  • 1 Clinic for Large Animals, Faculty of Veterinary Science, Szent István University H-1400 Budapest, P.O. Box 2, Hungary
  • 2 Department and Clinic of Internal Medicine, Faculty of Veterinary Science, Szent István University H-1400 Budapest, P.O. Box 2, Hungary
  • 3 Department and Clinic of Internal Medicine, Faculty of Veterinary Science, Szent István University H-1400 Budapest, P.O. Box 2, Hungary
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The aim of the study was to establish normal echocardiographic values of healthy Standardbred trotters not published previously. Twenty-three clinically normal horses weighing between 350 and 490 kg were examined in the same manner: first a thorough physical and then detailed echocardiographic examination were performed. Standardised two-dimensional (2D) and guided M-mode echocardiographic imaging techniques were used to measure interventricular septal thickness (IVS), left ventricular internal diameter (LVID), left ventricular wall thickness (LVW), left atrial internal diameter (LAID) in end-systole (s) and end-diastole (d) and aortic diameter (AOD) in end-diastole. Mean, range and standard deviation of the different parameters were calculated. The mean values (in centimetres) were as follow (2D/M-mode): IVSs: 4.6/4.7; IVSd: 3.1/3.0; LVIDs: 7.0/7.0; LVIDd: 10.7/10.7; LVWs: 3.9/3.9; LVWd: 2.7/2.7; LAIDs: 10.4/-; LAIDd: 11.3/-; AODd: 7.2/-. Results of two-dimensional and M-mode measurements were compared to each other and to normal values obtained from other breeds.

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