Document Detail


Three-dimensional computer model of the entire human heart for simulation of reentry and tachycardia: gap phenomenon and Wolff-Parkinson-White syndrome.
MedLine Citation:
PMID:  1768247     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A computer model of the entire human heart has been developed for simulation of the excitation and repolarization process. Spatial distribution of refractory periods and conduction velocities in the different cardiac tissues, the anisotropy of conduction in the ventricles, and the cycle length dependence of refractory periods and conduction velocities are taken into account. The algorithm calculating the activation process is based on a modified version of Huygen's principle for constructing wavefronts. This study presents simulations concerning the gap phenomenon of the conduction system and the initiation of tachycardias in a heart with Wolff-Parkinson-White syndrome. Results are compared for different basic cycle lengths and for normal and prolonged refractory periods in the His-Purkinje system. The gap phenomenon was found to be present only when using the prolonged refractory periods in the His-Purkinje-system at a cycle length of 700 ms. Induction of tachycardia by a single extrastimulus in the high right atrium in a heart with a bidirectionally conducting accessory pathway is possible by properly timed extrastimuli. The coupling interval of the stimulus for initiating a reentrant tachycardia depends on the cycle length, the conduction velocities and the set of refractory periods used. The same parameters determine whether or not a gap phenomenon in atrioventricular conduction occurs. The model may be useful for investigating similar questions concerning the reentry phenomena of tachycardia.
Authors:
R Killmann; P Wach; F Dienstl
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Basic research in cardiology     Volume:  86     ISSN:  0300-8428     ISO Abbreviation:  Basic Res. Cardiol.     Publication Date:    1991 Sep-Oct
Date Detail:
Created Date:  1992-02-20     Completed Date:  1992-02-20     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0360342     Medline TA:  Basic Res Cardiol     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  485-501     Citation Subset:  IM    
Affiliation:
Department of Biophysics, Graz University of Technology, Austria.
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MeSH Terms
Descriptor/Qualifier:
Atrioventricular Node / physiopathology
Bundle of His / physiopathology
Computer Simulation
Heart / physiopathology*
Heart Block / physiopathology
Heart Conduction System / physiopathology
Humans
Models, Cardiovascular*
Purkinje Fibers / physiopathology
Refractory Period, Electrophysiological
Tachycardia / physiopathology*
Tachycardia, Supraventricular / physiopathology
Wolff-Parkinson-White Syndrome / physiopathology*

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


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