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International Journal of Arrhythmia 2018;19(1): 33-35.
doi: https://doi.org/10.18501/arrhythmia.2018.005
Short-Long R-R Sequence Induced Implantable Cardioverter Defibrillator Shock by Dislodged Lead Even Having Normal Interrogation Parameter
Ki-Hun Kim MD, Sang-Hoon Seol MD, Seunghwan Kim MD, Dong-Kie Kim MD, Doo-Il Kim MD
Haeundae Paik Hospital, Department of Internal Medicine, Inje University College of Medicine, Busan, Korea
Corresponding Author: Sang-Hoon Seol ,Tel: +82-51-797-3070, Fax: +82-51-797-3009, Email: hacemed@hanmail.net
Received: February 13, 2018.  Accepted: March 16, 2018.
Inappropriate shocks from an implantable cardioverter defibrillator (ICD) can cause potentially dangerous ventricular arrhythmias and impaired quality of life. We describe a case in which a dislodged lead caused inappropriate ICD shocks through simultaneous sensing of atrial and ventricular signals. Interestingly, repeated short-long R-R sequences were recorded, but ICD interrogation parameters were usually unchanged.
Key Words: Defibrillators; Implantable; Lead