ACTIVE BOUNDARY CONDITIONS FOR MODELING PROPAGATING CARDIAC ACTION POTENTIALS.

Two active boundary conditions (BCs) are described which terminate propagating action potentials (PAPs) with minimal distortion. One of these BCs terminates a short cable with a stored steady-state PAP to approximate a much longer cable. The second BC exploits symmetry of propagation to avoid the use of a sealed-end BC at the stimulus end. These BCs reduce computer time and may help to avoid misleading results. Model results using these BCs are compared with results using the sealed-end BC.