ABSTRACT
We begin by recalling the three basic features of the heartbeat cycle upon which a mathematical model is to be developed. These are:
(a) the model must exhibit an equilibrium state corresponding to diastole;
(b) it should also contain a threshold for triggering the electrochemical wave emanating from the pacemaker causing the heart to contract into systole;
(c) it should reflect the rapid return to the equilibrium state.
