A Computer Simulation Study of Anatomy Induced Drift of Spiral Waves in the Human Atrium

Figure 10

Curved wall bridge with ridge simulations. (a) Epicardial view of the idealised model showing the bridge and the ridge in solid yellow, while the hemispherical atrial wall is shown as translucent. The bridge and ridge are below the atrial wall (i.e., on the endocardial side) in the presented view. (b) Representative snapshot from SW simulation. (c) and (d) Two partial tip traces where the initiation locations are shown by red dots and the tip trajectories are shown by translucent green (trajectory 1, left panel) and translucent purple (trajectory 2, right panel). The trajectories continue to drift around the structure and do not have an end location. (e) AP profiles recorded from the two simulations in panel (c), showing a periodic increase and decrease of AP amplitude. (f) PSD showing the multiple dominant frequency components in the AP profiles of panel (d). (g) Recurrence map of AP profiles of panel (d) showing multiple cycle lengths of localised pacing due to the complex drifting pattern of trajectories 1 and 2.

(a)

(b)

(c)

(d)

(e) AP profiles

(f) PSD

(g) Recurrence map