For some time now, cardiovascular evaluation of thoroughbreds using echocardiography has been one way to evaluate the performance potential of an unraced thoroughbred. Much of the work on this relationship was initially done many years ago by Dr. Norm Rantanen, Dr. David Lambert and Jeff Seder in America, while Dr. Lesley Young in the United Kingdom has also done a lot of work in this field. Echocardiography has emerged to become a standard diagnostic procedure in equine card