Echocardiographic changes related to exercise
The echocardiographic parameters were presented in Table 2.
Prior to exercise the values of LVIDd, LVIDs, EDV, SV and LA were 9.08 ±
0.34, 5.63 ± 0.26, 470.00 ± 37.41, 295.42 ± 24.20 and 7.59 ± 0.23
respectively. After exercise the values were 10.03 ± 0.24, 6.24 ± 0.19,
568.56 ± 28.70, 385.42 ± 23.77 and 8.43 ± 0.24 respectively. The values
of echocardiographic parameters were increased after exercise when
compared to before exercise. Highly significant increase in LVIDd,
LVIDs, EDV, SV and LA were seen after exercise.
Prior to exercise the values of LVPWd, ESV, EF, FS, and Ao were 2.30 ±
0.14, 167.00 ± 15.13, 62.23 ± 1.40, 35.29 ± 1.02 and 6.24 ± 0.16
respectively. After exercise the values were 2.67 ± 0.20, 197.54 ±
14.16, 67.76 ± 2.30, 40.51 ± 1.90 and 6.70 ± 0.20 respectively.
Significant increase in LVPWd, ESV, EF, FS, and Ao were seen after
exercise.
Left atrial dimension and left ventricular internal diameter during
diastole and systole, left ventricular posterior wall during diastole,
aortic diameter, end diastole volume, end systole volume, stroke volume,
ejection fraction and fractional shortening increased significantly
after exercise when compared to pre-exercise values.
Mild aortic regurgitation was noted on three horses after exercise
(Fig. 5) . Prior to the exercise there was no identifiable
aortic, mitral and tricuspid regurgitation in all horses.