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. 2015 Sep-Oct;48(5):867–873. doi: 10.1016/j.jelectrocard.2015.06.006

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© The Authors. Published by Elsevier B.V.

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

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Fig. 1 — (A) Simulated ECGs for two RR intervals or cycle lengths (CLs) of 1000 and 600 ms under stationary conditions. (B) Response of the T_pe interval after a change in the RR interval from 1000 to 600 ms, and illustration of t₉₀^Tpe computation. (C) Restitution curves corresponding to different spatial locations in the heart. Each curve represents the APD at different stationary RR intervals. α₁ and α₂ represent the maximum and minimum slopes for RR = 600 ms. (D) Difference between maximum and minimum restitution slopes, DRest, computed for a range of RR intervals.