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. 2017 May 15;375(2096):20160289. doi: 10.1098/rsta.2016.0289

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© 2017 The Authors.

Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited.

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Figure 3. — Isotropic medium: example of successful termination of the pinned spiral. The simulation is run in underdrive pacing (T_p=1.9T_sp) for t₁=80 ms and snapshots are taken from the interval following the delivery of the third stimulus. In (a) a new wave N is induced at the obstacle by the pulse, but this time part of the boundary is still refractory and does not get excited by the new shock. Therefore, only one end of the wave (A) is able to propagate and to collide with the surrounding waves (in particular with the small active pinned wave F) (a). The dynamics of the system then undergoes a transient (c–e), showing wave annihilation and break-up. At the end, the transient results in a stable regime in which the electrical activity in the tissue has been completely terminated (f). The snapshots are taken at 25 ms (a), 75 ms (b), 120 ms (c), 185 ms (d), 350 ms (e) and 700 ms (f) after the delivery of the pulse. (Online version in colour.)