title: Ventricular tachycardia and myocardial dysfunction in a horse.
abstract: Ventricular tachycardia develops less frequently than supraventricular dysrhythmias and generally is more indicative of cardiac disease. The horse in this report had clinical signs of lethargy and hypophagia and was determined to have sustained ventricular tachycardia. Echocardiography was a valuable diagnostic tool and revealed an echodense area in the left ventricle that had subnormal ventricular performance. A primary heart problem of an inflammatory nature was suspected. The horse responded favorably to treatment with lidocaine, antimicrobials, and aspirin, as well as stall rest. The horse was used successfully as a sire and hunter-jumper after treatment, but subsequently died 2.2 years later of massive hemoperitoneum. Necropsy revealed an extensive area in the left ventricle that appeared thin and fibrotic.
authors.affiliation: Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins 80523.
authors.forename: J L
authors.initials: JL
authors.lastname: Traub-Dargatz
authors.forename: J W
authors.initials: JW
authors.lastname: Schlipf
authors.forename: J
authors.initials: J
authors.lastname: Boon
authors.forename: G K
authors.initials: GK
authors.lastname: Ogilvie
authors.forename: D G
authors.initials: DG
authors.lastname: Bennett
authors.forename: W E
authors.initials: WE
authors.lastname: Wingfield
authors.forename: J M
authors.initials: JM
authors.lastname: Hutchison
mesh_terms: D000818:Animals; D000890:Anti-Infective Agents / Q000627:therapeutic use; D004452:Echocardiography / Q000662:veterinary; D004562:Electrocardiography / Q000662:veterinary; D006734:Horse Diseases / Q000000981:diagnostic imaging / Q000209:etiology / Q000503:physiopathology*; D006736:Horses; D008012:Lidocaine / Q000627:therapeutic use; D008297:Male; D009205:Myocarditis / Q000150:complications / Q000188:drug therapy / Q000662:veterinary; D017180:Tachycardia, Ventricular / Q000000981:diagnostic imaging / Q000503:physiopathology / Q000662:veterinary*; D018487:Ventricular Dysfunction, Left / Q000000981:diagnostic imaging / Q000209:etiology / Q000662:veterinary*
chemical_list: D000890:Anti-Infective Agents; D008012:Lidocaine