Electrocardiogram
The electrocardiogram parameters were presented in Table 1.
Heart rate and P wave amplitude were significantly increased after
exercise when compared to before exercise. Duration of P wave, PQ
interval, QT interval and RR interval were significantly shorter after
exercise when compared to before exercise. There was no significant
change in QRS complex duration, T wave amplitude and duration in before
and after exercise.
In the present study, before exercise 16 horses had bifid P-wave and 2
horses had a single P-wave. After exercise, 7 horses had bifid p-wave
and 11 horses had single P-wave. (Fig. 1)
In the present study, before exercise 12 horses had negative T-wave and
6 had positive T-wave. After exercise 13 horses had positive T waves and
5 had negative T waves. (Fig. 2) ST coving was noticed in two
horses after exercise.
No arrhythmias were noted before exercise but after exercise two horses
had sinus arrhythmia. One horse had sinus tachycardia (HR= 105 bpm)
(Fig. 4) and another one had second degree AV block Mobitz type
I. (Fig. 3)