Clinical and electrocardiographic predictors of T wave oversensing in patients with subcutaneous ICD
Background: T wave oversensing (TWOS) is a major drawback of the subcutaneous implantable cardioverter defibrillator (S-ICD). Data on predictors of TWOS in S-ICD recipients are limited. We sought to investigate predictors of TWOS in a cohort of patients receiving an S-ICD at our institution. Methods...
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doaj-1c1b08b486f64f97892766d7213c57ed2020-11-24T22:20:05ZengWileyJournal of Arrhythmia1880-42762016-06-0132318118510.1016/j.joa.2016.01.002Clinical and electrocardiographic predictors of T wave oversensing in patients with subcutaneous ICDMikhael F. El-Chami, MD0Bernard Harbieh, MD1Mathew Levy, BS2Angel R. Leon, MD3Faisal M. Merchant, MD4Department of Medicine, Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, Atlanta, GA 30308, USADepartment of Medicine, Division of Cardiology, American University of Beirut, AUBMC, Department of Internal Medicine, P.O. Box: 11-0236, Riad El-Solh, Beirut 1107 2020, LebanonDepartment of Medicine, Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, Atlanta, GA 30308, USADepartment of Medicine, Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, Atlanta, GA 30308, USADepartment of Medicine, Division of Cardiology, Section of Electrophysiology, Emory University School of Medicine, 550 Peachtree Street NE, Atlanta, GA 30308, USABackground: T wave oversensing (TWOS) is a major drawback of the subcutaneous implantable cardioverter defibrillator (S-ICD). Data on predictors of TWOS in S-ICD recipients are limited. We sought to investigate predictors of TWOS in a cohort of patients receiving an S-ICD at our institution. Methods: S-ICD recipients at our center were identified retrospectively and stratified based on the presence or absence of TWOS. Clinical and electrocardiographic parameters were collected and compared between the 2 groups. Results: Ninety-two patients underwent an S-ICD implantation at our institution between April 2010 and January 2015. Six (6.5%) patients had TWOS. These patients were younger (38.1±13.7 vs. 52.3±16.1 years, p=0.04) and had higher left ventricle ejection fractions (48.5±14.9% vs. 28.4±12.2%, p<0.01) than patients without a history of TWOS. Baseline 12-lead electrocardiogram (ECG) parameters were not different between the 2 groups. Leads I, II, and avF (which mimic the sensing vectors of the S-ICD) were further inspected to identify ECG characteristics that could predict TWOS. The QRS amplitude in ECG lead I was significantly smaller in the TWOS group than in the non-TWOS group (3.7 vs. 7.4 mV, p=0.02). Conclusion: In this study, younger age, higher ejection fraction, and lower QRS amplitude were associated with TWOS. These findings could help identify patients referred for S-ICD at high-risk of TWOS.http://www.sciencedirect.com/science/article/pii/S1880427616000090Subcutaneous ICDT wave oversensingInappropriate shocks |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mikhael F. El-Chami, MD Bernard Harbieh, MD Mathew Levy, BS Angel R. Leon, MD Faisal M. Merchant, MD |
spellingShingle |
Mikhael F. El-Chami, MD Bernard Harbieh, MD Mathew Levy, BS Angel R. Leon, MD Faisal M. Merchant, MD Clinical and electrocardiographic predictors of T wave oversensing in patients with subcutaneous ICD Journal of Arrhythmia Subcutaneous ICD T wave oversensing Inappropriate shocks |
author_facet |
Mikhael F. El-Chami, MD Bernard Harbieh, MD Mathew Levy, BS Angel R. Leon, MD Faisal M. Merchant, MD |
author_sort |
Mikhael F. El-Chami, MD |
title |
Clinical and electrocardiographic predictors of T wave oversensing in patients with subcutaneous ICD |
title_short |
Clinical and electrocardiographic predictors of T wave oversensing in patients with subcutaneous ICD |
title_full |
Clinical and electrocardiographic predictors of T wave oversensing in patients with subcutaneous ICD |
title_fullStr |
Clinical and electrocardiographic predictors of T wave oversensing in patients with subcutaneous ICD |
title_full_unstemmed |
Clinical and electrocardiographic predictors of T wave oversensing in patients with subcutaneous ICD |
title_sort |
clinical and electrocardiographic predictors of t wave oversensing in patients with subcutaneous icd |
publisher |
Wiley |
series |
Journal of Arrhythmia |
issn |
1880-4276 |
publishDate |
2016-06-01 |
description |
Background: T wave oversensing (TWOS) is a major drawback of the subcutaneous implantable cardioverter defibrillator (S-ICD). Data on predictors of TWOS in S-ICD recipients are limited.
We sought to investigate predictors of TWOS in a cohort of patients receiving an S-ICD at our institution.
Methods: S-ICD recipients at our center were identified retrospectively and stratified based on the presence or absence of TWOS. Clinical and electrocardiographic parameters were collected and compared between the 2 groups.
Results: Ninety-two patients underwent an S-ICD implantation at our institution between April 2010 and January 2015. Six (6.5%) patients had TWOS. These patients were younger (38.1±13.7 vs. 52.3±16.1 years, p=0.04) and had higher left ventricle ejection fractions (48.5±14.9% vs. 28.4±12.2%, p<0.01) than patients without a history of TWOS. Baseline 12-lead electrocardiogram (ECG) parameters were not different between the 2 groups. Leads I, II, and avF (which mimic the sensing vectors of the S-ICD) were further inspected to identify ECG characteristics that could predict TWOS. The QRS amplitude in ECG lead I was significantly smaller in the TWOS group than in the non-TWOS group (3.7 vs. 7.4 mV, p=0.02).
Conclusion: In this study, younger age, higher ejection fraction, and lower QRS amplitude were associated with TWOS. These findings could help identify patients referred for S-ICD at high-risk of TWOS. |
topic |
Subcutaneous ICD T wave oversensing Inappropriate shocks |
url |
http://www.sciencedirect.com/science/article/pii/S1880427616000090 |
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