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Abstract

Calcium ion spiral wave induced by random released calcium ion sparks in single heart cell is studied using the improved discrete fire-diffuse-fire model and phase analysis method. The results show that calcium ion spiral wave can be excited in resting heart cell by calcium ion sparks at an appropriate release frequency. The key of the generation of calcium ion spiral wave is the emergence of the phase singularity caused by the calcium sparks in the different time and space sequences. The number of phase singularity is exponentially linked with calcium ion spark frequency, and has the limit in a fixed system.

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Authors and contacts

Bai Yong-Qiang¹,
Zhu Xing^2,3

1.
2.
3.
Funds:Project supported by the Natural Science Foundation of Heilongjiang Province, China (Grant No. A200911), and the National Basic Research Program of China (Grant No. 2007CB936800).

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Vol. 61, Issue 15 - 2012-08-05

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