Cardiac Spiral Wave
FitzHugh-Nagumo model — re-entrant arrhythmia on cardiac tissue
Excitability a
0.10
Recovery ε
0.05
Coupling D
1.0
Trigger Spiral
Reset Tissue
FitzHugh-Nagumo model:
dv/dt = v(v-a)(1-v) - w + D∇²v
dw/dt = ε(v - w)
v = membrane potential
w = recovery variable
Red
= excited tissue
Blue/dark
= refractory
Click canvas to stimulate
a region of tissue.
Spiral waves ↔ ventricular
tachycardia. Broken wave tip
= fibrillation.