This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as doi: 10.1111/pace.12974. This article is protected by copyright. All rights reserved. “Spontaneous Twiddlers” syndrome: The importance of the device shape Enes E. Gul, MD 1 , Usama Boles, MD 1 , Sohaib Haseeb, BSc 2 , Benedict Glover, MD 1 , Chris Simpson 1 , MD, Adrian Baranchuk MD, and Kevin Michael, MD 1 . 1 Heart Rhythm Service, Kingston General Hospital, Queen’s University, Kingston, Ontario, Canada 2 Department of Biomedical and Molecular Sciences, Queen’s University, Kingston, Ontario, Canada Conflict of interest and disclosure All authors declare that, the manuscript, as submitted or its essence in another version, is not under consideration for publication elsewhere, and it will not be submitted elsewhere until a final decision is made by the editors of PACE. The authors have no commercial associations or sources of support that might pose a conflict of interest. All authors have made substantive contributions to the study, and all authors endorse the data and conclusions. Nevertheless, confirmation of informed patient consent for publication was obtained.