University of Florida uses electrical cardioversion to treat atrial fibrillation in international dressage horse

Kelly Layne's Udon P returned to competition in 2015, with all his heart
Original background photo of Udon P courtesy of the University of Florida College of Veterinary Medicine Udon P and Kelly Layne were scheduled to represent Australia in the 2014 FEI World Equestrian Games when a heart rhythm disorder was diagnosed in the 14-year-old Dutch Warmblood gelding. Treatment at the University of Florida College of Veterinary Medicine and a layoff helped the horse recover, and he’s back in competition at the international level. Their goal is to represent Australia in dressage at the 2016 Olympics in Rio de Janeiro, Brazil.

Thanks to Sarah Carey, director of public relations at the University of Florida College of Veterinary Medicine, for providing this information about Udon P. A similar condition was diagnosed in former World Cup champion Jerich Parzival of the Dutch dressage team. He received a similar treatment at the University of Ghent in Belgium.

A world-class dressage horse treated successfully at the University of Florida for an irregular heartbeat has rediscovered his rhythm and returned to international competition.

His proud trainer, Kelly Layne, a member of the Australian team at the 2006 World Equestrian Games in Germany and now a Wellington, Florida resident, is thrilled with Udon P’s comeback. She hopes he’ll pick up where he left off before his cardiac problem disrupted their training and that the 14-year-old Dutch Warmblood will qualify for the 2016 Summer Olympics in Rio de Janeiro, Brazil.

“He’s a high-level athlete, but what’s interesting to me is the fact that his owner, in concert with his trainer, embraced his problem, when many people would rather not discuss their animal’s health conditions publicly,” said Chris Sanchez, D.V.M., Ph.D., an associate professor of large animal internal medicine at the UF College of Veterinary Medicine and a member of Udon P’s care team. 

“This horse’s owners took the opposite approach — they have taken this as a learning opportunity and even developed a heart-themed freestyle for his return to competition,” Sanchez said.

Layne attributes Udon P’s success to his, well, exceptional heart.

“Not many horses go through what he has and then fight their way back into the international competition arena,” she said. “We should definitely reward and celebrate the horses that have this kind of moxie.”

Known by his stable name, Noodles, Udon P arrived at UF’s Large Animal Hospital in April 2014 as a rising star in the world of dressage. He was competing at the Grand Prix level and had recently won an international freestyle event in Wellington.

“In the four international competitions known as the Concours Dressage International, he competed in nine tests with scores as high as 73.6 percent,” Layne said. “We were having an exceptional first season at the international Grand Prix.”

But fate intervened, shortly before Layne and her husband, Steve, were going to fly the horse to Normandy, France to represent Australia in the 2014 FEI World Equestrian Games. He began showing signs of distress, including bleeding from the nose, coughing and unexpected gait changes.

“Noodles loves to canter, so we were very concerned,” Layne said. “It became impossible to train.”

The Laynes’ veterinarian, Meg Miller Turpin, D.V.M., diagnosed atrial fibrillation, otherwise known as an irregular heartbeat. She referred the horse to UF’s Large Animal Hospital for a procedure known as electrical cardioversion. The facility is the only equine veterinary hospital in Florida capable of providing the procedure.

• • • • •

The University of Florida website offers a page with information about atrial fibrillation in horses. Once diagnosed, atrial fibrillation can be treated with the drug quinidine, but there are potential side effects such as ataxia, nasal edema, colic, hives, laminitis and rarely death. 

According to the web page, electrical cardioversion (or transvenous electrical cardioversion) is indicated for horses that are resistant to conversion with quinidine therapy or develop signs of toxicity with attempted conversion with quinidine. Transvenous electrical cardioversion is UF’s preferred method for conversion of atrial fibrillation in horses. The success rate at the UF Large Animal Hospital is close to 100% with no post-procedure complications thus far.

• • • • •

The Laynes pulled Udon P from competition and focused on their horse’s health.

Although the horse sailed through the procedure, his recovery back home in Wellington was somewhat rocky, Layne said.

“The pressure to fly to Europe was gone as we had withdrawn Noodles from consideration. He just needed time to regain his health and confidence,” she said. “We had OK days and some not very good days. However, his heart was strong and remained in normal rhythm at 40 to 42 beats per minute.”

About six weeks after the horse’s discharge from UF, a large thunderstorm brought gusty, cool air to Wellington. For Layne, it was a pivotal event.

“Perhaps it was the combination of the cooler weather and the storm, or maybe it was just time, but Noodles switched on and since that moment has never missed a beat, both figuratively and literally,” she said.

To celebrate his return to competition, Layne collaborated with a British composer to create a freestyle routine consisting of songs that have the heart as a theme. The routine was first performed in January, when Udon P was back in competition.

“We wanted to dedicate this freestyle to his big heart that wouldn’t give up,” Layne said. “Probably the most emotional song in it is ‘My Heart Will Go On,’ from the movie ‘Titanic.’ Everyone involved has been touched by this amazing horse.”

Udon P is “coming along nicely” for the 2016 competitive season, but Layne is equally excited about her horse’s continued good health and attitude.

“Pretty amazingly, he has just not had any health issues for the past 14 months,” Layne said. “Not many horses enter the arena with such willingness and enthusiasm.”

Note: As an update to this story, Kelly Layne and Udon P finished 11th last weekend in the FEI Grand Prix at Dressage at Devon in Pennsylvania, and 10th in the Grand Prix Freestyle.

It’s not mentioned in the article, but Udon P is owned by Whistlejacket Farm.

To learn more on The Jurga Report:Shocking News from Cornell’s Hospital for Large Animals 

The Heart of the Matter: The University of Guelph’s Dr. Peter Physick-Sheard’s Mini-Lectures on the Horse Heart 




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