| Inappropriate shock therapy in a heart failure defibrillator. | |
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MedLine Citation:
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PMID: 11270706 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A 63-year-old male with dilated cardiomyopathy underwent implantation of a "heart failure" defibrillator capable of biventricular pacing. He received an inappropriate shock 5 hours after the procedure. Stored electrograms revealed that during each sinus beat the ventricular channel recorded up to three separate events. These resulted from far-field atrial sensing by the coronary venous lead, appropriate right ventricular sensing, then delayed left ventricular sensing (the result of left bundle branch block). As a consequence of far-field left atrial sensing the two subsequent ventricular electrograms fell within the VF zone. Following an atrial premature beat, VF detection criteria were satisfied and shock therapy delivered. Although coronary venous lead repositioning eliminated far-field atrial sensing, double counting of the widely split right and left ventricular electrograms still occurred during sinus rhythm. Shortening the programmed AV delay resulted in constant biventricular pacing with a single electrogram. |
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Authors:
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T R Betts; S Allen; P R Roberts; J M Morgan |
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Publication Detail:
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Type: Case Reports; Journal Article |
Journal Detail:
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Title: Pacing and clinical electrophysiology : PACE Volume: 24 ISSN: 0147-8389 ISO Abbreviation: Pacing Clin Electrophysiol Publication Date: 2001 Feb |
Date Detail:
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Created Date: 2001-03-28 Completed Date: 2001-07-26 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 7803944 Medline TA: Pacing Clin Electrophysiol Country: United States |
Other Details:
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Languages: eng Pagination: 238-40 Citation Subset: IM |
Affiliation:
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Wessex Cardiothoracic Center, Southampton General Hospital, United Kingdom. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Algorithms Cardiac Pacing, Artificial Cardiomyopathy, Dilated / therapy* Defibrillators, Implantable* Electrocardiography Electrophysiologic Techniques, Cardiac Equipment Failure Humans Male Middle Aged Time Factors Ventricular Fibrillation / diagnosis |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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