Figure 3 | Scientific Reports

Figure 3

From: Recurrence quantification analysis for fine-scale characterisation of arrhythmic patterns in cardiac tissue

Figure 3

Snapshots (spaced by 100 ms) of each group of AP propagation modelled on a smaller tissue square (with the size of \(4\times {4}\,{\text{cm}}\)). At each tissue site, the time series is analyzed using RQA, OI, RP eigenvalues and entropy. Examples of individual time series at the points in red and magenta are given in Fig. 4. The dynamic parameters of these time series are then used to classify individual propagations. (A) A spiral wave anchored to a highly fibrotic region resulting in sustained re-entry. (B) Meandering spiral wave. (C) Tissue experiencing fibrillatory activation. (D) Spiral wave anchored to a scar region (bottom right), that breaks up into wavelets away from the main rotor.

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