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.13105. This article is protected by copyright. All rights reserved. Oversensing and Inappropriate Shock in a patient with Subcutaneous Implantable Cardioverter Defibrillator: What is the mechanism? Running title: Inappropriate Shock in a patient with S-ICD Aditya Saini, MD; Kenneth A. Ellenbogen, MD FHRS Division of Cardiac Electrophysiology, Virginia Commonwealth University, Richmond, Virginia, USA Correspondence Kenneth A. Ellenbogen, MD Virginia Commonwealth University Medical Center P.O. Box 980053 Richmond, VA 23298-0053 Phone : 804-828-7565 Fax : 804-828-6082 E-mail: kenneth.ellenbogen@vcuhealth.org Total Word Count: 1524 words Keywords: Defibrillation, ICD, Oversensing, Shock Disclosures: Dr. Ellenbogen receives honoraria and research grants from Boston Scientific