Document Detail

Characteristics of ventricular fibrillation in relation to cardiac aetiology and shock success: A waveform analysis study in ICD-patients.
MedLine Citation:
PMID:  25449343     Owner:  NLM     Status:  Publisher    
BACKGROUND: Ventricular fibrillation (VF) waveform characteristics are associated with cardiac arrest duration and defibrillation success. Recent animal studies found that VF characteristics and shock success also depend on the presence of myocardial infarction (MI). In patients, VF induction after implantable cardioverter defibrillator (ICD) implantation offers a unique setting to study early VF characteristics: we studied the relation with cardiac disease - either presence or absence of a previous MI - and with shock success.
METHODS: Retrospective cohort study of ICD-patients who underwent defibrillation testing, 117 (63%) with and 69 (37%) without a previous MI. Intracardiac recordings of induced VF were analysed using Fourier analysis.
RESULTS: In previous MI-patients, the fundamental frequency and organisation index of the VF signal were significantly lower as compared with patients without a previous MI: 4.9Hz±0.6 vs. 5.2Hz±0.6 (p=0.005) and 56%±10 vs. 60%±9 (p=0.001), respectively. The median frequency was not different (p=0.25). We found no association between VF characteristics and ICD shock success.
CONCLUSIONS: In analogy with observations in animals, we found that a history of a previous MI was associated with slower and less organised VF. In our cohort of ICD-patients, early VF waveform characteristics were not associated with shock outcomes. Further study is warranted to determine to what extent VF characteristics are influenced by the underlying aetiology on the one hand, and time delay on the other. These findings could improve insight into the potential value of VF analysis to guide shock delivery.
Judith L Bonnes; Wessel Keuper; Sjoerd W Westra; Erwin S Zegers; Thom F Oostendorp; Marc A Brouwer; Joep L R M Smeets
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-10-18
Journal Detail:
Title:  Resuscitation     Volume:  -     ISSN:  1873-1570     ISO Abbreviation:  Resuscitation     Publication Date:  2014 Oct 
Date Detail:
Created Date:  2014-12-2     Completed Date:  -     Revised Date:  2014-12-3    
Medline Journal Info:
Nlm Unique ID:  0332173     Medline TA:  Resuscitation     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2014 Elsevier Ireland Ltd. All rights reserved.
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