Mechanism of ventricular defibrillation

R. E. Ideker, J. M. Wharton, N. Shibata, P. S. Chen, P. D. Wolf, W. M. Smith

Research output: Contribution to conferencePaper

1 Scopus citations

Abstract

A summary is presented of findings about the mechanisms by which a shock succeeds or fails in halting ventricular fibrillation. It is shown that earliest activations following a subthreshold defibrillation shock occur in regions of low potential gradient generated by the shock. Activation fronts after subthreshold shocks are not continuations of fronts present just before the shock. An upper limit exists to the strength of shocks that induce fibrillation during the vulnerable period of regular rhythm and correlates with the defibrillation threshold. The response to shocks during regular rhythm just below the upper limit of vulnerability is similar to the response to subthreshold defibrillation shocks. To defibrillate, a shock must not only halt the activation fronts of fibrillation, but it must also not give rise to new activation fronts that reinduce fibrillation.

Original languageEnglish (US)
Pages210-211
Number of pages2
StatePublished - Nov 1 1988
Externally publishedYes
EventProceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society - New Orleans, LA, USA
Duration: Nov 4 1988Nov 7 1988

Other

OtherProceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society
CityNew Orleans, LA, USA
Period11/4/8811/7/88

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Ideker, R. E., Wharton, J. M., Shibata, N., Chen, P. S., Wolf, P. D., & Smith, W. M. (1988). Mechanism of ventricular defibrillation. 210-211. Paper presented at Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, New Orleans, LA, USA, .