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Cardioversion of atrial fibrillation in a dog with structural heart disease using an esophageal-right atrial lead configuration
Affiliation:1. Department of Clinical Sciences, The Ohio State University College of Veterinary Medicine, 601 Vernon L Tharp St., Columbus, OH 43210, USA;2. The Heart Center, Nationwide Children''s Hospital, 700 Children''s Dr., Columbus, OH 43205, USA;1. Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Florida, 2015 SW 16th Avenue, Gainesville, FL 32608, USA;2. Veterinary Heart Care, 5124 Greenwich Road, Virginia Beach, VA 23462, USA;1. University of Wisconsin, School of Veterinary Medicine, Department of Medical Sciences (Cardiology), 2015 Linden Drive, Madison, WI 53706, USA;2. University of Wisconsin, School of Medicine and Public Health, Department of Radiology, 600 Highland Avenue, Madison, WI 53792, USA;3. University of Wisconsin, School of Veterinary Medicine, Department of Surgical Sciences (Radiology and Surgery), 2015 Linden Drive, Madison, WI 53706, USA;4. University of Wisconsin, School of Medicine and Public Health, Department of Urology, 1685 Highland 21 Avenue, Madison, WI 53705, USA;1. Department of Small Animal Clinical Sciences, University of Florida, College of Veterinary Medicine, Gainesville, FL 32608, USA;2. Department of Veterinary Clinical Sciences, Louisiana State University, Baton Rouge, LA 70803, USA;3. Department of Clinical Sciences, Cornell University, College of Veterinary Medicine, Ithaca, NY 14853, USA;1. Department of Veterinary Clinical Sciences, The Ohio State University College of Veterinary Medicine, Columbus, OH, USA;2. Small Animal Teaching Hospital, School of Veterinary Science, University of Liverpool, Leahurst, Chester High Road, Neston, Cheshire, UK;3. Department of Clinical Science and Services, Royal Veterinary College, London, UK;4. Veterinary Medical Teaching Hospital, School of Veterinary Medicine, University of California-Davis, Davis, CA, USA;5. Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, USA;6. Department of Veterinary Clinical Sciences and the Veterinary Teaching Hospital, College of Veterinary Medicine, Purdue University, West Lafayette, IN, USA;7. Department of Clinical Sciences, Cummings School of Veterinary Medicine at Tufts University, North Grafton, MA, USA;1. Department of Veterinary Clinical Sciences, Washington State University, College of Veterinary Medicine, P.O. Box 647060, Pullman, WA 99164-7060, USA;2. Department of Veterinary Microbiology and Pathology, Washington State University, College of Veterinary Medicine, P.O. Box 647060, Pullman, WA 99164-7060, USA
Abstract:Atrial fibrillation is a common arrhythmia in dogs with structural cardiac disease and can result in significant clinical signs. Several methods of electrical cardioversion of atrial fibrillation have been described. Biphasic transthoracic cardioversion of atrial fibrillation in dogs with naturally occurring heart disease has been described in veterinary medicine and has been shown to be highly successful. In humans and research animals intracardiac and transesophageal cardioversion of atrial fibrillation has been described as an alternative to transthoracic cardioversion. While transesophageal cardioversion is very successful in humans and research animals, this technique has not been previously described in a clinical patient with naturally occurring heart disease in veterinary medicine. This report describes the use of transesophageal cardioversion in a dog with atrial fibrillation and structural cardiac disease. Cardioversion was unsuccessful using two electrodes positioned within the esophagus. Cardioversion of atrial fibrillation to normal sinus rhythm was successfully achieved and maintained using one electrode positioned within the esophagus and one electrode positioned within the right atrium using a synchronized monophasic shock of 50 J.
Keywords:Canine  Defibrillation  Intracardiac  Supraventricular  Tachyarrhythmia
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