A beat-to-beat variation in cardiac action potential durations (APD) is a phenomenon known as electrical alternans. Alternans desynchronizes depolarization, increases dispersion of refractoriness and creates a substrate for ventricular fibrillation. In the heart, APD alternans can be accompanied by alternans in intracellular calcium ([Ca2+]i) transients. Recently, we demonstrated experimentally that the onset of APD alternans in the heart is a local phenomenon that undergoes complex spatiotemporal dynamics as pacing rate increases. Moreover, the local onset of APD alternans can be predicted by measuring the restitution properties of periodically paced cardiac tissue. The purpose of this research is to investigate the interplay between local onsets of APD and [Ca2+]i alternans using 2D simulation of action potential model of cardiac myocytes.
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ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control
October 31–November 2, 2011
Arlington, Virginia, USA
Conference Sponsors:
- Dynamic Systems and Control Division
ISBN:
978-0-7918-5476-1
PROCEEDINGS PAPER
Local Onset of Voltage and Calcium Alternans in the Heart
Stephen D. McIntyre,
Stephen D. McIntyre
University of Minnesota, Minneapolis, MN
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Yoichiro Mori,
Yoichiro Mori
University of Minnesota, Minneapolis, MN
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Elena G. Tolkacheva
Elena G. Tolkacheva
University of Minnesota, Minneapolis, MN
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Stephen D. McIntyre
University of Minnesota, Minneapolis, MN
Yoichiro Mori
University of Minnesota, Minneapolis, MN
Elena G. Tolkacheva
University of Minnesota, Minneapolis, MN
Paper No:
DSCC2011-6148, pp. 607-610; 4 pages
Published Online:
May 5, 2012
Citation
McIntyre, SD, Mori, Y, & Tolkacheva, EG. "Local Onset of Voltage and Calcium Alternans in the Heart." Proceedings of the ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control. ASME 2011 Dynamic Systems and Control Conference and Bath/ASME Symposium on Fluid Power and Motion Control, Volume 2. Arlington, Virginia, USA. October 31–November 2, 2011. pp. 607-610. ASME. https://doi.org/10.1115/DSCC2011-6148
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