| Undersensing by an ICD Due to Alternans of the Ventricular Electrogram. | |
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MedLine Citation:
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PMID: 23347031 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Alternans of the ventricular electrogram (VEGM) during ventricular tachycardia (VT) is a rare cause of ventricular undersensing by an implantable cardioverter-defibrillator (ICD). This report describes a patient with a St. Jude ICD who exhibited sustained monomorphic VT associated with surface QRS alternans, alternating cycle lengths, alternans of the VEGM causing intermittent undersensing of the smaller component, and intermittent 2:1 counting of ventricular intervals during 1:1 sensing in response to the ICD detection algorithm. VEGM undersensing was corrected noninvasively simply by programming the threshold start from 62.5% to 50% which increased the sensitivity based on the amplitude of the VEGM. This maneuver did not affect the satisfactory and stable defibrillation threshold. |
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Authors:
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Frederic E Van Heuverswyn; Liesbeth Timmers; Roland X Stroobandt; S Serge Barold |
Publication Detail:
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Type: Journal Article Date: 2012-08-13 |
Journal Detail:
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Title: Annals of noninvasive electrocardiology : the official journal of the International Society for Holter and Noninvasive Electrocardiology, Inc Volume: 18 ISSN: 1542-474X ISO Abbreviation: Ann Noninvasive Electrocardiol Publication Date: 2013 Jan |
Date Detail:
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Created Date: 2013-01-25 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9607443 Medline TA: Ann Noninvasive Electrocardiol Country: United States |
Other Details:
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Languages: eng Pagination: 84-9 Citation Subset: IM |
Copyright Information:
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©2012, Wiley Periodicals, Inc. |
Affiliation:
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Heart Center, University Hospital Ghent, Ghent, Belgium. |
Export Citation:
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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