Inappropriate defibrillator shock due to oversensing. What is the mechanism?

Implantable cardioverter defibrillator (ICD) is often advised for secondary prevention of sudden cardiac death. Inappropriate shocks from ICD is uncommon but can seriously affect the quality of life. One of the reasons for inappropriate ICD shock is loose set screw, which may remain undetected by de...

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Main Authors: Debabrata Bera, Daljeet Kaur Saggu, Goddu Sreeram Chandra Murthy, Sachin Yalagudri, Chennapragada Sridevi, Calambur Narasimhan
Format: Article
Language:English
Published: Elsevier 2021-01-01
Series:Indian Pacing and Electrophysiology Journal
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S0972629220301145
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author Debabrata Bera
Daljeet Kaur Saggu
Goddu Sreeram Chandra Murthy
Sachin Yalagudri
Chennapragada Sridevi
Calambur Narasimhan
author_facet Debabrata Bera
Daljeet Kaur Saggu
Goddu Sreeram Chandra Murthy
Sachin Yalagudri
Chennapragada Sridevi
Calambur Narasimhan
author_sort Debabrata Bera
collection DOAJ
description Implantable cardioverter defibrillator (ICD) is often advised for secondary prevention of sudden cardiac death. Inappropriate shocks from ICD is uncommon but can seriously affect the quality of life. One of the reasons for inappropriate ICD shock is loose set screw, which may remain undetected by device interrogation and/or fluoroscopy. A 55-year lady presented with multiple inappropriate shocks few hours after an ICD implantation. The discrepancy between near field (NF, tip to ring) and far field (FF, Can to RV coil) signals helped us to suspect noise related to loose set screw, as the underlying problem. Re-exploration of the pocket had to be performed as the last resort to confirm the diagnosis and rectify the problem.
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spelling doaj.art-e898498c9b4f4b958edbc7d67b92bb722022-12-21T20:19:34ZengElsevierIndian Pacing and Electrophysiology Journal0972-62922021-01-012115458Inappropriate defibrillator shock due to oversensing. What is the mechanism?Debabrata Bera0Daljeet Kaur Saggu1Goddu Sreeram Chandra Murthy2Sachin Yalagudri3Chennapragada Sridevi4Calambur Narasimhan5Dept of Cardiology, RTIICS, Kolkata, IndiaDept of Cardiology, AIG Hospitals, Hyderabad, IndiaDept of Cardiology, CARE Hospital, Vishakhapatnam, IndiaDept of Cardiology, AIG Hospitals, Hyderabad, IndiaDept of Cardiology, AIG Hospitals, Hyderabad, IndiaDept of Cardiology, AIG Hospitals, Hyderabad, India; Corresponding author. Department of Cardiology, arrhythmia services, AIG Hospital, Hyderabad, India.Implantable cardioverter defibrillator (ICD) is often advised for secondary prevention of sudden cardiac death. Inappropriate shocks from ICD is uncommon but can seriously affect the quality of life. One of the reasons for inappropriate ICD shock is loose set screw, which may remain undetected by device interrogation and/or fluoroscopy. A 55-year lady presented with multiple inappropriate shocks few hours after an ICD implantation. The discrepancy between near field (NF, tip to ring) and far field (FF, Can to RV coil) signals helped us to suspect noise related to loose set screw, as the underlying problem. Re-exploration of the pocket had to be performed as the last resort to confirm the diagnosis and rectify the problem.http://www.sciencedirect.com/science/article/pii/S0972629220301145Inappropriate ICD shockLoose set screwNear field-marker channel discrepancy
spellingShingle Debabrata Bera
Daljeet Kaur Saggu
Goddu Sreeram Chandra Murthy
Sachin Yalagudri
Chennapragada Sridevi
Calambur Narasimhan
Inappropriate defibrillator shock due to oversensing. What is the mechanism?
Indian Pacing and Electrophysiology Journal
Inappropriate ICD shock
Loose set screw
Near field-marker channel discrepancy
title Inappropriate defibrillator shock due to oversensing. What is the mechanism?
title_full Inappropriate defibrillator shock due to oversensing. What is the mechanism?
title_fullStr Inappropriate defibrillator shock due to oversensing. What is the mechanism?
title_full_unstemmed Inappropriate defibrillator shock due to oversensing. What is the mechanism?
title_short Inappropriate defibrillator shock due to oversensing. What is the mechanism?
title_sort inappropriate defibrillator shock due to oversensing what is the mechanism
topic Inappropriate ICD shock
Loose set screw
Near field-marker channel discrepancy
url http://www.sciencedirect.com/science/article/pii/S0972629220301145
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