Document Detail


Postshock sensing performance in transvenous defibrillation lead systems: analysis of detection and redetection of ventricular fibrillation.
MedLine Citation:
PMID:  8535557     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
INTRODUCTION: The sensing performance of transvenous lead systems may be adversely affected by the delivery of high-energy shocks. This may be due to the proximity of the sensing and energy-delivery electrodes on transvenous leads. METHODS AND RESULTS: The time required for detection of ventricular fibrillation and redetection after a failed first shock was compared in 93 patients with five different lead system-pulse generator combinations: Cadence--Endotak 60 series, Ventak P--Endotak 60 series, Jewel--Transvene, Cadence--TVL, and Cadence--Transvene. A total of 418 successful and 204 failed first shocks were delivered during induced ventricular fibrillation. Redetection times (RED) were consistently shorter than detection times (DET) in the Jewel-Transvene (RED minus DET: -1.9 +/- 0.8 sec, P < 0.0001), the Cadence-TVL (-1.6 +/- 1.0 sec, P < 0.0001), and the Cadence-Transvene combinations (-2.0 +/- 0.9 sec, P < 0.0004). Redetection times were not significantly different than detection times in the Cadence-Endotak combination (0.9 +/- 3.1 sec; P = 0.09). Redetection times were significantly longer than detection times in the Ventak-Endotak combination (1.2 +/- 2.3 sec; P = 0.034). Prolonged individual redetection episodes (> 8.2 sec) were observed in the Cadence-Endotak (7 [10%] of 73 episodes) and the Ventak-Endotak (4 [10%] of 39 episodes), but not in the Jewel-Transvene, the Cadence-TVL, and the Cadence-Transvene combinations. CONCLUSIONS: Redetection of ventricular fibrillation may be delayed in some transvenous lead-pulse generator combinations. Successful redetection of ventricular fibrillation following a failed first shock should be demonstrated prior to hospital discharge of patients with implantable defibrillators.
Authors:
D J Callans; U S Swarna; D Schwartzman; C D Gottlieb; F E Marchlinski
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of cardiovascular electrophysiology     Volume:  6     ISSN:  1045-3873     ISO Abbreviation:  J. Cardiovasc. Electrophysiol.     Publication Date:  1995 Aug 
Date Detail:
Created Date:  1996-02-08     Completed Date:  1996-02-08     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9010756     Medline TA:  J Cardiovasc Electrophysiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  604-12     Citation Subset:  IM    
Affiliation:
Clinical Electrophysiology Laboratory, Philadelphia Heart Institute, Presbyterian Medical Center, Pennsylvania 19104, USA.
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Aged
Data Interpretation, Statistical
Defibrillators, Implantable*
Electrocardiography
Female
Humans
Male
Middle Aged
Retrospective Studies
Ventricular Fibrillation / diagnosis*,  physiopathology,  therapy
Comments/Corrections
Comment In:
J Cardiovasc Electrophysiol. 1995 Aug;6(8):613-5   [PMID:  8535558 ]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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