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Average over depth during optical mapping of cardiac propagation

  • Zhenghong Xu
  • , Zhenxi Zhang
  • , Yinbin Jin
  • , Jing Wang
  • Xi'an Jiaotong University

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

High-resolution optical mapping with voltagesensitive dyes has become a powerful tool to depict complex propagation patterns of cardiac transmembrane potentials. Many studied have proved that this optical signal obtained from tissue surface is the response of the transmembrane potential averaged upon depth rather than only surface. In order to investigate the differentia between the two transmembrane potentials, in this paper, we simulated cardiac propagation using Luo-Rudy (L-R) model and calculated the transmembrance potentials average over depth by an optical decay constant from 0.0 mm to 3.0mm. Our results suggest that the transmembrance potentials weighted average over depth is different from that on the tissue surface, the discrepancy between them depends on the depth of the fluorescence emission of the tissue. If only top layer of tissue (<1.0mm) contributes the fluorescence, optical mapping is an almost accurate representation of surface activation dynamics.

Original languageEnglish
Title of host publicationProceedings of the 2005 27th Annual International Conference of the Engineering in Medicine and Biology Society, IEEE-EMBS 2005
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages4314-4316
Number of pages3
ISBN (Print)0780387406, 9780780387409
DOIs
StatePublished - 2005
Event2005 27th Annual International Conference of the Engineering in Medicine and Biology Society, IEEE-EMBS 2005 - Shanghai, China
Duration: 1 Sep 20054 Sep 2005

Publication series

NameAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume7 VOLS
ISSN (Print)0589-1019

Conference

Conference2005 27th Annual International Conference of the Engineering in Medicine and Biology Society, IEEE-EMBS 2005
Country/TerritoryChina
CityShanghai
Period1/09/054/09/05

Keywords

  • Cardiac
  • Luo-Rudy model
  • Optical mapping

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