Figure 4

2D simulation with altered electrophysiology in the BrS region without structural abnormalities. (a) Sequence of snapshots taken from the \(10 \times 10\) cm tissue model. The value of \(d_w^0\) was 0.4, whereas the radius of the BrS region was 3.5 cm. Diffuse fibrosis was not present. Sustained reentry was not induced. (b) Membrane potential in the BrS region recorded in the point indicated by a black dot in the snapshots. After the first lost dome AP, orthodromic reentry generates a delayed dome AP caused by electrotonic currents from the healthy tissue. Red dashed lines indicate the time instants at which snapshots were taken.