Three-year-old colt suddenly collapsed

Medina Spirit, the Kentucky Derby-winning horse that failed a drug test afterward and cast a cloud over the victory, died earlier this week during a workout at Santa Anita race track.

“Following the completion of a routine morning workout, Medina Spirit collapsed on the track at Santa Anita Park and died suddenly of a probable cardiac event according to the on-site veterinary team who attended to him,’’ track officials said in a statement.

“The Santa Anita Park veterinary team, led by Senior Veterinarian Dr. Laurie Bohannon, immediately took blood, hair and urine samples from Medina Spirit. Those samples were sent to the California Horse Racing Board (CHRB). A full necropsy, as per protocol in California, run by the (UC Davis) School of Veterinary Medicine will be performed to try and ascertain the exact cause of this sudden death. The results of the necropsy and toxicology studies will be released by the California Horse Racing Board as part of their inquiry into the cause of this unfortunate event.’’

In a separate statement, CHRB officials said the 3-year-old colt collapsed near the finish line while completing a workout on the main track at Santa Anita.

“He died immediately,’’ according to the CHRB. “This is termed a sudden death. All horses that die within facilities regulated by the California Horse Racing Board undergo postmortem (necropsy) examination at a California Animal Health and Food Safety diagnostic laboratory under the auspices of the University of California, Davis. Cause of death cannot be determined until the necropsy and toxicology tests have been completed.’’

Jeff Blea, equine medical director for the CHRB, told Thoroughbred Daily News that he saw a video of the horse’s workout, and Medina Spirit appeared to labor toward the end.

“He looked like he was struggling the last part, and the rider was pulling him up,’’ Blea told Thoroughbred Daily News.

Blea said the horse collapsed just after reaching the wire at the end of his workout, and by the time the track veterinarian reached Medina Spirit, the colt was already dead.

“Sudden death is the cause of the death,’’ Blea told the publication, speculating that “oftentimes, these are cardiovascular.’’

The horse, trained by Bob Baffert, won the Kentucky Derby in May but later tested positive for the steroid betamethasone, leading to challenges to the validity of the victory. Officials at Churchill Downs announced that Medina Spirit would be disqualified if the test was confirmed, and it suspended Baffert for two years.

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