Optical recordings of cardiac transmembrane potential around an extracellular electrode in electrically anisotropic, bullfrog atrium

Michel Neunlist, Leslie Tung

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

We have studied the spatial distribution of cardiac transmembrane potential around an extracellular unipolar electrode during electrical stimulation. The recordings were obtained from the bullfrog atrium along the transverse and longitudinal fiber directions. These recordings revealed the presence of a uniformly polarized region in the transverse fiber direction. In the longitudinal fiber direction, adjacent oppositely polarized regions coexist. These results are qualitatively predicted by an activation function developed for uncoupled fibers. They contradict the predictions of conventional cable models and also support newly developed models of cardiac tissue.

Original languageEnglish (US)
Pages (from-to)43-44
Number of pages2
JournalAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Volume16
Issue numberpt 1
StatePublished - 1994
Externally publishedYes
EventProceedings of the 16th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. Part 1 (of 2) - Baltimore, MD, USA
Duration: Nov 3 1994Nov 6 1994

ASJC Scopus subject areas

  • Signal Processing
  • Biomedical Engineering
  • Computer Vision and Pattern Recognition
  • Health Informatics

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