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Related Experiment Videos

Vortex action potentials in normal ventricular muscle.

A T Winfree1

  • 1Department of Ecology and Evolutionary Biology, University of Arizona, Tucson 85721.

Annals of the New York Academy of Sciences
|January 1, 1990
PubMed
Summary
This summary is machine-generated.

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Healthy heart tissue can develop electrical instabilities like vortices, potentially causing arrhythmias and sudden cardiac death. Understanding these mechanisms may improve treatments for ventricular tachycardia and fibrillation.

Area of Science:

  • Cardiovascular Electrophysiology
  • Computational Biology

Background:

  • Ventricular myocardium exhibits complex electrical behavior despite structural nonuniformities.
  • Excitable media can support self-sustaining wave phenomena like vortices.

Purpose of the Study:

  • To investigate the electrical behavior of healthy ventricular myocardium.
  • To explore the role of vortices in cardiac arrhythmias.

Main Methods:

  • High-resolution electrical mapping of ventricular myocardium.
  • Electrical stimulation during the vulnerable period.

Main Results:

  • Healthy myocardium behaves like a uniformly anisotropic excitable medium.
  • Periodic vortex activity can be evoked by specific electrical stimuli.

Related Experiment Videos

  • Tissue discontinuities and heterogeneity increase vulnerability.

    • Conclusions:

    • Vortices may underlie reentrant tachycardias and ventricular fibrillation.
    • Understanding these mechanisms can inform improved arrhythmia management strategies.