[local physicists] REMINDER: Colloquium 9/18/2013 (Dr. Christian Zemlin)

[Malin, Delicia M.]

Old Dominion University
Department of Physics

Fall Colloquium Series

Tuesday September 18, 2012

"Cardiac Arrhythmias and the Geodesic Principle for Filaments in Excitable Media"


Dr. Christian Zemlin
Old Dominion University

In the Cardiac Electrophysiology Lab we study the mechanisms of arrhythmias both experimentally and from a theoretical point of view.  Arrhythmias are disturbances in the normal electrical activity of the heart.  In experiments, we extract animal hearts visualize their electrical activity using voltage-sensitive fluorescent probes.  The most dangerous arrhythmias are reentrant arrhythmias;  they are composed of self-sustained,  high-frequency waves called "scroll waves" that rotate around one-dimensional phase singularities called filaments.  Scroll waves exist not only in the heart but in a large variety of excitable media. The complex dynamics of scroll waves can be most efficiently described by via the dynamics of their filaments.  Particularly elegant is the "geodesic principle" that allows the computation of steady state filaments for a large class of excitable media.


Presentation: OCNPS 200 @ 3:00 pm
Refreshments: Atrium @ 2:30 pm


More details at http://sci.odu.edu/physics/
All are Welcome!



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