Document Detail

Selective dysfunction of ventricular electrode-endocardial junction following DC cardioversion in a patient with a dual chamber pacemaker.
MedLine Citation:
PMID:  9058877     Owner:  NLM     Status:  MEDLINE    
A patient with a dual chamber pacemaker received two transthoracic (anterior-anterior paddle position) shocks for VF. Subsequent analysis of stimulation thresholds revealed a marked rise in the ventricular threshold only. Later, she received three additional shocks (anterior-posterior paddle position) during electrophysiological study to terminate episodes of induced VT. Following these, the ventricular stimulation threshold was > 10 V at 2.0 ms. The selective damage at the ventricular site in this patient led us to carry out in vitro studies that revealed a preferential shunting of high electrical energy into the ventricular lead, as compared to the atrial lead, following a DC shock. These observations may explain the selective pacing malfunction observed in out patient.
G Das; D B Staffanson
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Publication Detail:
Type:  Case Reports; Journal Article    
Journal Detail:
Title:  Pacing and clinical electrophysiology : PACE     Volume:  20     ISSN:  0147-8389     ISO Abbreviation:  Pacing Clin Electrophysiol     Publication Date:  1997 Feb 
Date Detail:
Created Date:  1997-05-23     Completed Date:  1997-05-23     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  7803944     Medline TA:  Pacing Clin Electrophysiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  364-5     Citation Subset:  IM    
VA Medical Center, Las Vegas, Nevada, USA.
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MeSH Terms
Burns, Electric / etiology
Electric Countershock / adverse effects*
Equipment Failure
Heart Ventricles / injuries
Middle Aged
Pacemaker, Artificial*
Comment In:
Pacing Clin Electrophysiol. 1997 Sep;20(9 Pt 1):2289-90   [PMID:  9309762 ]

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

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