| bcl | basic cycle length |
| beats | nr of beats in prepacing |
| st | current density of the stimulus (uA/cm^2) |
| tstim | timing of the stimulus from start of simulation |
| stl | duration of stimulus (ms) |
| a | radius of the cell (cm) |
| l | length of the cell (cm) |
| rgc | capacitive/geometric area ratio |
| rvss | subspace volume (ratio) |
| rvmyo | myoplasm volume (ratio) |
| rvmito | mythocondrial volume (ratio) |
| rvsr | sarcoplasmic reticulum volume (ratio) |
| rvnsr | network sarcoplasmic reticulum volume (ratio) |
| rvjsr | junctional sarcoplasmic reticulum volume (ratio) |
| temp | temperature (Kelvin) |
| udt | time step (ms) |
| t | initial time |
| v | initial transmembrane potential (mV) |
| ach | acetylcholine concentration (mM) |
| cao | extracellular Ca concentration (mM) |
| ko | extracellular K concentration (mM) |
| nao | extracellular Na concentration (mM) |
| adpi | intracellular ADP concentration (uM) |
| atpi | intracellular ATP concentration (uM) |
| cai | intracellular Ca concentration (mM) |
| ki | intracellular K concentration (mM) |
| mgi | intracellular Mg concentration (mM) |
| nai | intracellular Na concentration (mM) |
| jsr | jsr Ca concentration (mM) |
| nsr | nsr Ca concentration (mM) |
| caiss | subspace Ca concentration (mM) |
| kiss | subspace K concentration (mM) |
| naiss | subspace Na concentration (mM) |
| pca | permeability of the membrane to Ca (cm/s) |
| pna | permeability of the membrane to Na (cm/s) |
| pk | permeability of the membrane to K (cm/s) |
| csqnbar | Max. [Ca] buffered in calsequestrin (mM) |
| cmdnbar | Max. [Ca] buffered in calmodulin (mM) |
| trpnbar | Max. [Ca] buffered in troponin (mM) |
| nsrbar | Max. [Ca] in the network sarcoplasmic reticulum (mM) |
| csqn | [Ca] buffered in calsequestrin |
| cmdn | [Ca] buffered in calmodulin |
| trpn | [Ca] buffered in troponin |
| kmcsqn | equilibrium constant of calsequestrin buffering |
| kmcmdn | equilibrium constant of calmodulin buffering |
| kmtrpn | equilibrium constant of troponin buffering |
| tautr | time constant of Ca transfer to junctional sarcoplasmic reticulum (ms) |
| taudiffss | Time constant of ion transfer from Subspace to Myoplasm (ms) |
| ibarpca | Max. Ca current through sarcolemmal Ca pump (uA/uF) |
| ibarnak | Max. current through sarcolemmal Na/K pump (uA/uF) |
| iupbar | Max. current through iup channel (mM/ms) |
| knaca | scaling factor for I Na/Ca |
| knacamyo | scaling factor for I Na/Ca, myoplasmic component |
| knacass | scaling factor for I Na/Ca, subspace component |
| scgna | scaling factor for the maximum conducance of the fast Na inward current |
| scgcal | scaling factor for the maximum conducance of the L-type Ca inward current |
| scgirel | scaling factor for the maximum conductance of the I rel current |
| scgcat | scaling factor for the maximum conducance of the T-type Ca inward current |
| scgtof | scaling factor for the maximum conductance of the transient outward f current |
| scgtos | scaling factor for the maximum conductance of the transient outward s current |
| scgkr | scaling factor for the maximum conductance of the rapid outward K current |
| scgks | scaling factor for the maximum conductance of the slow outward K current |
| scgki | scaling factor for the maximum conductance of the Ki current |
| scgkp | scaling factor for the maximum conductance of the Kp current |
| scgst | scaling factor for the maximum conductance of the sustained Na inward current |
| scgf | scaling factor for the maximum conductance of the funny current |
| scgkach | scaling factor for the maximum conductance of the Ach activated K current |
| scgcab | scaling factor for the maximum conductance of the Ca background current |
| scgnab | scaling factor for the maximum conductance of the Na background current |