The horse is an animal predisposed to sport. Therefore any cardiac abnormality is detrimental to normal sporting career. Some diseases like heart murmur may have no impact on the performance of the horse against the blasts important heart, cardiac arrhythmias, pericarditis are frequently the cause of stopping sporting careers. To lim the suffering heart it is essential to carry out a work setting high quality condition. The diagnosis of cardiac abnormality is often discovered by chance, it will be confirmed by additional tests such ultrasound, electrocardiogram.