Analysis of differences in cardiac structure and function in Ili horses of different genders.

The experiment aimed to investigate the differences in cardiac structure and function in different genders of Ili horses under the same nutritional level. Thirty 2-year-old Ili horses were selected for the experiment. Using a color Doppler ultrasound system at a frequency of 2.5 MHz, two-dimensional (2D) and M-mode images were obtained between the third and fifth ribs beside the right sternum of the horses. Nineteen cardiac structural indices and thirteen cardiac functional indices were collected. The results showed that there was no linear relationship between the body weight and size of Ili horses and the cardiac structural and functional indices. The RVDd and LV minor in stallions were higher than those in mares (P<0.005). The MVD of mares was higher than that of stallions (P<0.05), and the PAd was higher than that of stallions (P<0.01). The SV of stallions was higher than that of mares (P<0.05), and the SI was higher than that of mares (P<0.01). The HR, ET and LAD/AOD in mares were higher than those in stallions (P<0.01). The study indicates that there are gender differences in the cardiac indices of structure and function in Ili horses. The experiment provides a preliminary reference range for the cardiac function and parameters of 2-year-old Ili horses, which can be useful for further research on the cardiac health of Ili horses. [ABSTRACT FROM AUTHOR]