Detection of the origin of atrial tachycardia by 3D electro‐anatomical mapping and treatment by radiofrequency catheter ablation in horses |
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Authors: | Glenn Van Steenkiste Tim Boussy Mattias Duytschaever Ingrid Vernemmen Stijn Schauvlieghe Annelies Decloedt Gunther van Loon |
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Affiliation: | 1. Equine Cardioteam Ghent University, Department of Large Animal Internal Medicine, Ghent University, Merelbeke Belgium ; 2. Department of Cardiology, AZ Groeninge, Kortrijk Belgium ; 3. Department of Cardiology, AZ Sint‐Jan, Bruges Belgium ; 4. Department of Surgery and Anaesthesiology of Domestic Animals, Ghent University, Merelbeke Belgium |
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Abstract: | BackgroundAtrial tachycardia (AT) can be treated by medical or electrical cardioversion but the recurrence rate is high. Three‐dimensional electro‐anatomical mapping, recently described in horses, might be used to map AT to identify a focal source or reentry mechanism and to guide treatment by radiofrequency ablation.ObjectivesTo describe the feasibility of 3D electro‐anatomical mapping and radiofrequency catheter ablation to characterize and treat sustained AT in horses.AnimalsNine horses with sustained AT.MethodsRecords from horses with sustained AT referred for radiofrequency ablation at Ghent University were reviewed.ResultsThe AT was drug resistant in 4 out of 9 horses. In 8 out of 9 horses, AT originated from a localized macro‐reentrant circuit (n = 5) or a focal source (n = 3) located at the transition between the right atrium and the caudal vena cava. In these 8 horses, local radiofrequency catheter ablation resulted in the termination of AT. At follow‐up, 6 out of 8 horses remained free of recurrence.Conclusions and Clinical ImportanceDifferentiation between focal and macro‐reentrant AT in horses is possible using 3D electro‐anatomical mapping. In this study, the source of right atrial AT in horses was safely treated by radiofrequency catheter ablation. |
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Keywords: | arrhythmia atrial flutter electrophysiology focal atrial tachycardia supraventricular tachyarrhythmia |
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