The heart score theory in the racehorse.
D000818:Animals; D004562:Electrocardiography / Q000662:veterinary; D005260:Female; D006321:Heart / Q000033:anatomy & histology / Q000502:physiology*; D006339:Heart Rate; D006736:Horses / Q000502:physiology*; D008297:Male; D009929:Organ Size; D005082:Physical Exertion; D012737:Sex Factors; D013177:Sports