Veterinary advice should be sought before applying any treatment or vaccine.
Tricuspid Valve Regurgitation
Tricuspid regurgitation (TR) is a type of cardiac heart murmur which is frequently found in Thoroughbred and Standardbred racehorses. Incidences and severity of TR increase with the horse's age and level of training.
TR involves the leakage of blood backwards through the tricuspid valve, into the right atrium, occurring with every contraction made by the right ventricle. The additional blood present in the right atrium causes it to enlarge and pump harder.
Horses with severe mitral regurgitation and pulmonary hypertension associated with congestive heart failure as well as (less commonly) horses with severe respiratory disease can develop TR.