This news item is about: When medical treatment fails, cardiologists at the Cornell University College of Veterinary Medicine can now offer a procedure that resets the quivering heart of a horse in atrial fibrillation to bring back its normal heartbeat. Drs. Romain Pariaut, associate professor and section chief of cardiology and Bruce Kornreich, associate director of the Feline Health Center and staff cardiologist, recently performed a transvenous electrical cardioversion (TVEC) to treat a horse diagnosed with atrial fibrillation (AF), a rapid, irregular heart rhythm that causes decreased blood flow from the heart. This procedure, which involves