Figure 6.

Spatiotemporal distribution of Ca waves in an anatomically accurate 3D model of the atria. (A) Distribution of $s_{ijk}$ and (B) $\text{Δ}{a}_{ijk}$ on the surface of the rabbit atria. The atria is paced simultaneously at $T=380ms$ and beat-to-beat differences are computed using the 15th and 16th beats. The global time step was taken to be $25\mu s$, and the spatial discretization size was $0.7mm$. A uniform isotropic diffusion of $7\times {10}^{-4}c{m}^2/ms$ was assumed for the tissue. Simulations were performed using WebGL 2.0 as detailed in Ref. (35). All computations, as well as visualization and post-processing of the results, were carried out simultaneously and interactively on a Radeon RX 5700 XT graphic card.