Example b2124 - coupled bidomain - torso This example solves the bidomain equation through to a point where an activation wave is well established and then iterates between the extracellular and the boundary element problem to get the epicardial fluxes to match. The heart is a FE mesh. The torso is made up of a BE torso cavity, two BE lungs and a FE outer layer. The heart has been refined twice in xi 1 and the torso is unrefined.