A two-component model is developed consisting of a discrete loop of cardiac cells that circulates action potentials as well as a pacing mechanism. Physiological properties of cells such as restitutions of refractoriness and of conduction velocity are given via experimentally measured functions. The dynamics of circulating pulses and the pacer’s action are regulated by two threshold relations. Patterns of spontaneous initiations and terminations of reentry (SITR) generated by this system are studied through numerical simulations and analytical observations. These patterns can be regular or irregular; causes of irregularities are identified as the threshold bistability (T-bistability) of reentrant circulation and in some cases, also phase-resetting interactions with the pacer.
Copyright © 2008 Academic Press.
The definitive version is available at: http://www.sciencedirect.com/science/article/pii/S0022519308002397
Sedaghat, H., M. A. Wood, John W. Cain, C. K. Cheng, C. M. Baumgarten, and D. M. Chan. "Complex Temporal Patterns of Spontaneous Initiation and Termination of Reentry in a Loop of Cardiac Tissue." Journal of Theoretical Biology 254, no. 1 (2008): 14-26. doi:10.1016/j.jtbi.2008.05.003.
Sedaghat, H.; Wood, M. A.; Cain, John W.; Cheng, C. K.; Baumgarten, C. M.; and Chan, D. M., "Complex temporal patterns of spontaneous initiation and termination of reentry in a loop of cardiac tissue" (2008). Math and Computer Science Faculty Publications. 68.