Transcutaneous direct current cardioversion in a foal with lone atrial fibrillation.
There are rare published reports of atrial fibrillation (AF) in foals, all of which are associated with structural heart disease or within the adaptive period of newborns. This report describes a 3-month-old Thoroughbred filly with AF and a structurally normal heart on echocardiography. Medical cardioversion of the foal's AF was attempted with three 20mg/kg doses of quinidine sulfate therapy without success. Timed, transcutaneous, direct current cardioversion was successfully performed using adhesive patches on the midthorax in conjunction with intravenous procainamide at a total dose of 20mg/kg. A normal sinus rhythm was maintained through discharge from the hospital and at recheck 5 months after cardioversion. Transcutaneous direct current cardioversion presents a feasible alternative to quinidine sulfate or transvenous electrical cardioversion in young or lower body weight equids.
Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, 601 Vernon Tharp Street, Columbus, OH 43210, USA.
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BM
Potter
Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, 601 Vernon Tharp Street, Columbus, OH 43210, USA. Electronic address: Brian.Scansen@colostate.edu.
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BA
Scansen
Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, 601 Vernon Tharp Street, Columbus, OH 43210, USA.
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LK
Dunbar
Rood and Riddle Equine Hospital, 2150 Georgetown Road, Lexington, KY 40511, USA.
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Reed
Department of Veterinary Clinical Sciences, College of Veterinary Medicine, The Ohio State University, 601 Vernon Tharp Street, Columbus, OH 43210, USA.
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Toribio
D000818:Animals; D001281:Atrial Fibrillation / Q000628:therapy / Q000662:veterinary*; D004554:Electric Countershock / Q000662:veterinary*; D006734:Horse Diseases / Q000628:therapy*; D006736:Horses
Arrhythmia; Electrocardiography; Equine