Graffiti, a 17-year-old Latvian warmblood gelding, experienced a dangerous recurrence of atrial fibrillation (AFib) after being stable on medication for 18 months. His owner, Cyndy Kagan, brought him to Oregon State University’s (OSU) Lois Bates Acheson Veterinary Teaching Hospital, where Dr. Erica McKenzie performed the first-ever transvenous equine cardioversion (TVEC) procedure in Oregon. This advanced technique involves delivering synchronized electrical shocks via catheters inserted into the heart to restore normal rhythm, offering a high success rate and an alternative to medication, which had significant side effects and increased costs.

The procedure was a collaborative effort involving multiple hospital departments and expert guidance from a visiting cardiologist. Graffiti responded well, converting to a normal heart rhythm after nine shocks and recovering smoothly under anesthesia care. While Graffiti will remain on medication to maintain his heart rhythm, the availability of TVEC at OSU provides a vital regional option for treating equine AFib, benefiting both patients and veterinary students by showcasing cutting-edge cardiac care. Kagan expressed gratitude for the comprehensive care and local access to this advanced treatment, hopeful for Graffiti’s continued health and eventual retirement.