Tracé électrocardiographique au repos et après le test d’effort chez des chevaux Arabes et Arabebarbes

Abstract

Electrocardiography after an exercise test is a valuable tool in the field of horse riding to assess the physiological state of the horse, given the heavy load on the cardiovascular system during and after the exercise. This study involves monitoring some electrocardiographic parameters at rest, after trotting exercise and after galloping exercise, along with the influence of age, breed and height of the horse on these parameters. The study was performed on 10 Arab and Arab-barb horses through base-apex lead,the heart rate variability is calculated using the time domain analysis, and corrected QT intervals are calculated according to three different formulae. The exercise has changed the heart rate variability indexes, most components of the electrocardiogram and Bazett's corrected QT interval. These changes reflect the increased activity of the sympathetic nervous system and the decreased activity of the arasympathetic nervous system, inducing a rise in the amplitudes and a shortening in the durations, this latter can be affected by horse age and breed. At the level of the heart rate variability, this study allowed us to highlight an interaction between exercise and height.