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Ectopic activity generated by early after-depolarizations in ventricular tissue: a computer simulation study

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5 Author(s)
Saiz, J. ; L.I.B.-D.I.E., Univ. Politecnica de Valencia, Spain ; Monserrat, M. ; Ferrero, J.M., Jr. ; Ferrero, J.M., Jr.
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A computer model of two partially coupled ventricular fibers was used to study conditions in which EADs generated in a zone of ventricular myocardium may propagate to other zones, inducing ectopic activity. The model consists of two one-dimensional arrays of cells coupled by a resistance R. EADs are induced in one of the segments while the other is kept under normal conditions. For values of R in the range from 38 Ω cm2 to 50 Ω cm2, the second EAD that appears in the EAD segment propagates to the normal segment as an ectopic beat. For R values out of this range the EAD only increases the action potential duration in some cells of the normal zone and ectopic activity in the normal cells is not observed

Published in:

Computers in Cardiology, 1996

Date of Conference:

8-11 Sep 1996