Atrioventricular accessory pathways in 89 dogs: Clinical features and outcome after radiofrequency catheter ablation
| Autor: | Wright, Kathy N, Connor, Chad E, Irvin, Holly M, Knilans, Timothy K, Webber, Dawn, Kass, Philip H |
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| Rok vydání: | 2018 |
| Předmět: |
Male
tachycardia-induced cardiomyopathy tachycardia Cardiovascular Accessory Atrioventricular Bundle Dogs Treatment Outcome congestive heart failure Rare Diseases Heart Disease orthodromic atrioventricular reciprocating tachycardia Catheter Ablation Animals Female Dog Diseases Veterinary Sciences accessory pathway ventricular preexcitation |
| Zdroj: | Journal of veterinary internal medicine, vol 32, iss 5 |
| Popis: | BackgroundAtrioventricular accessory pathways (APs) in dogs have been reported rarely. Data regarding clinical presentation and long-term outcome after radiofrequency catheter ablation (RFCA) are limited.Hypothesis/objectivesTo study clinical features, electrophysiologic characteristics, and outcome of RFCA in dogs with APs.AnimalsEighty-nine dogs presented consecutively for RFCA of APs.MethodsCase series.ResultsLabrador retrievers (47.2% of dogs) and male dogs (67.4% of dogs) were most commonly affected. Labrador retrievers were more likely to be male than non-Labrador breeds (P = .043). Clinical signs were nonspecific and most commonly included lethargy and gastrointestinal signs. Concealed APs were more prevalent in Labrador retrievers than other breeds (P = .001). Right-sided APs (91.7%) predominated over left-sided (8.3%). Tachycardia-induced cardiomyopathy (TICM) occurred in 46.1% of dogs, with complete resolution or substantial improvement noted on one-month postablation echocardiograms. Radiofrequency catheter ablation successfully eliminated AP conduction long term in 98.8% of dogs in which it was performed. Complications occurred in 5/89 dogs. Recurrence in 3 dogs was eliminated long term with a second procedure.Clinical importance/conclusionsAccessory pathways are challenging to recognize in dogs because of nonspecific clinical signs, frequency of concealed APs that show no evidence of their presence during sinus rhythm, and intermittent occurrence of tachyarrhythmias resulting from APs. Tachycardia-induced cardiomyopathy commonly occurs with AP-mediated tachycardias and should be considered in any dog presenting with a dilated cardiomyopathic phenotype because of its good long-term prognosis with rhythm control. Radiofrequency catheter ablation is a highly effective method for eliminating AP conduction and providing long-term resolution. |
| Databáze: | OpenAIRE |
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