A critique of impedance measurements in cardiac tissue.

Published

Journal Article

The specific impedance of cardiac tissue cannot be measured directly. Instead, the investigator obtains voltage and current measurements and places them into a model of the tissue's structure to infer the impedances of elements of the model. If the model fails to describe major aspects of the real tissue, the results may be worthless, although possibly self-consistent. In the literature of impedance measurement in cardiac tissue, only rarely is the model explicitly described; more commonly, the tissue model is adopted implicitly when equations giving the impedance in terms of voltage and current measurements are adopted. This paper examines the series of models that have been used in specific impedance measurements of cardiac tissue and shows how the same or similar measurements can accurately describe tissue impedivity or can lead to significant errors when inadequate models such as isotropic and anisotropic monodomains (although a part of work of historical merit) are used.

Full Text

Duke Authors

Cited Authors

  • Plonsey, R; Barr, RC

Published Date

  • January 1, 1986

Published In

Volume / Issue

  • 14 / 4

Start / End Page

  • 307 - 322

PubMed ID

  • 3752637

Pubmed Central ID

  • 3752637

Electronic International Standard Serial Number (EISSN)

  • 1573-9686

International Standard Serial Number (ISSN)

  • 0090-6964

Digital Object Identifier (DOI)

  • 10.1007/bf02367405

Language

  • eng