CVM Cardiovascular Medicine 1664-204X 1664-2031 EMH Schweizerischer Ärzteverlag AG Farnsburgerstrasse 8 CH-4132 Muttenz 02207 10.4414/cvm.2023.02207 Case report Myocardial Disease Reentrant atrial tachycardia in a patient with arrhythmogenic right ventricular cardiomyopathy Guan Fu fu.guan@usz.ch Cardiology | SWITZERLAND | +41763738759 Duru Firat Arrhythmia and Electrophysiology Division, Department of Cardiology, University Heart Center, Zurich, Switzerland Saguner Ardan M Arrhythmia and Electrophysiology Division, Department of Cardiology, University Heart Center, Zurich, Switzerland 22 03 2023 26 02 0 0 Copyright: EMH Schweizerischer Ärzteverlag AG 2023 EMH Schweizerischer Ärzteverlag AG "Cardiovascular Medicine" is an open access publication of EMH published in accordance with the terms of the Creative Commons licence attribution - NonCommercial - NoDerivatives 4.0 International. You are free to share, copy and redistribute the material in any medium or format under the following terms: Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. NonCommercial — You may not use the material for commercial purposes. NoDerivatives — If you remix, transform, or build upon the material, you may not distribute the modified material. "Non-commercial" means not primarily intended for or directed towards commercial advantage or monetary compensation. The incorporation of publications in commercial products, the use of publications to advertise for commercial products or services and any other usage that directly or indirectly pursues commercial interests is subject to the express previous consent of the publishing house as part of a written agreement. Please send us your request in writing. Exact indication of the publication from which you would like to reproduce material and detailed information about its intended use help to facilitate and expedite request processing.

Although typical atrial flutter and atrial fibrillation (AF) are not uncommon in patients with arrhythmogenic right ventricular cardiomyopathy (ARVC), there is limited information on atrial tachycardia (AT) in this population. A 59-year-old man with a diagnosis of  definite ARVC according to the 2010 Task Force Criteria without overt left ventricular involvement presented with recurrent palpitations. The surface 12-lead electrocardiogram raised the suspicion of atrial tachycardia. The patient had no history of cardiac surgery or cardiac ablation. During tachycardia passive activation of the right atrium (RA) was visible through invasive electroanatomical mapping indicating a left atrial (LA) origin of the tachycardia. High-density mapping of the LA confirmed a reentrant tachycardia with a figure of eight activation pattern originating from a small scar in the anterior LA wall. Radiofrequency catheter ablation targeting the area of slow conduction in this area terminated the tachycardia and rendered it non-inducible.