Document Detail

On-line cardiac mapping: an analog approach using video and multiplexing techniques.
MedLine Citation:
PMID:  7065267     Owner:  NLM     Status:  MEDLINE    
A video and multiplexing system is described that provides a source of display in real-time, slow-motion, and stop-frame modes of ventricular activation. The displayed image, consisting of a matrix of 112 dots, is arranged to represent a polar projection of the ventricles. The dots brighten at the time of local cardiac activation, which is sensed by an electrode array monitoring the myocardium. Experiments in in situ canine hearts have provided detailed depictions at 8.3-ms intervals of the ventricular activation sequence during sinus and ventricularly paced rhythm. The origin of ventricular paced beats can be located with an accuracy of less than 5 mm. Coronary occlusion produces a defect in the displayed image that outlines the ischemic area and demonstrates regions of delayed conduction. This approach to ventricular mapping provides a detailed on-line display of activation with a recording capacity of 1 h. The system offers a practical, inexpensive alternative to computerized methods of investigating ventricular arrhythmias in both the experimental and intraoperative environment.
I Parson; P Mendler; E Downar
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The American journal of physiology     Volume:  242     ISSN:  0002-9513     ISO Abbreviation:  Am. J. Physiol.     Publication Date:  1982 Apr 
Date Detail:
Created Date:  1982-05-27     Completed Date:  1982-05-27     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  0370511     Medline TA:  Am J Physiol     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  H526-35     Citation Subset:  IM    
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MeSH Terms
Electric Stimulation
Heart / physiology*
Ventricular Function
Videotape Recording / instrumentation,  methods

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

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