Document Detail

Clinical use of intracardiac impedance: current applications and future perspectives.
MedLine Citation:
PMID:  11341089     Owner:  NLM     Status:  MEDLINE    
For over 40 years the measurement of intracardiac impedance has been proposed as a method of assessing the contractile state of the heart muscle. This technique requires the positioning of one or more intracavitary electrodes and the generation of an electric field from an alternating current source. Variations in the calculated impedance signal reflect changes in the ventricular blood pool volume adjacent to the electrodes. Intracardiac impedance measurement has been successfully developed as a research tool to assess myocardial contractility, and from this, clinical uses have evolved. Commercial rate responsive pacing systems use intracardiac impedance to assess the inotropic state of the heart. Further development of this technology might allow hemodynamic discrimination of cardiac arrhythmias.
W Arthur; G C Kaye
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Review    
Journal Detail:
Title:  Pacing and clinical electrophysiology : PACE     Volume:  24     ISSN:  0147-8389     ISO Abbreviation:  Pacing Clin Electrophysiol     Publication Date:  2001 Apr 
Date Detail:
Created Date:  2001-05-08     Completed Date:  2001-09-27     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  7803944     Medline TA:  Pacing Clin Electrophysiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  500-6     Citation Subset:  IM    
Castle Hill Hospital, Castle Road, Cottingham, East Yorkshire, England.
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MeSH Terms
Arrhythmias, Cardiac / diagnosis,  therapy
Cardiography, Impedance*
Heart Rate / physiology
Myocardial Contraction / physiology*
Pacemaker, Artificial*
Stroke Volume / physiology

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

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