$\frac{-(\mathrm{i\_Na}+\mathrm{i\_Ca\_L}+\mathrm{i\_t}+\mathrm{i\_ss}+\mathrm{i\_f}+\mathrm{i\_K1}+\mathrm{i\_B}+\mathrm{i\_NaK}+\mathrm{i\_NaCa}+\mathrm{i\_Ca\_P}+\mathrm{i\_Stim}+\mathrm{I\_inter})}{\mathrm{Cm}}$ $\begin{cases}\mathrm{stim\_amplitude} & \text{if $(\mathrm{time\_}\ge \mathrm{stim\_start})\land (\mathrm{time\_}\le \mathrm{stim\_end})\land (\mathrm{time\_}-\mathrm{stim\_start}-\lfloor \frac{\mathrm{time\_}-\mathrm{stim\_start}}{\mathrm{stim\_period}}\rfloor \mathrm{stim\_period}\le \mathrm{stim\_duration})$}\\ 0 & \text{otherwise}\end{cases}$ $\frac{\mathrm{m\_infinity}-m}{\mathrm{tau\_m}}$ $\frac{1}{1+e^{\frac{V+45}{-6.5}}}$ $\frac{0.00136}{\frac{0.32(V+47.13)}{1-e^{-0.1(V+47.13)}}+0.08e^{\frac{-V}{11}}}$ $\frac{\mathrm{h\_infinity}-h}{\mathrm{tau\_h}}$ $\frac{1}{1+e^{\frac{V+76.1}{6.07}}}$ $\begin{cases}0.0004537(1+e^{\frac{-(V+10.66)}{11.1}}) & \text{if $V\ge -40$}\\ \frac{0.00349}{0.135e^{\frac{-(V+80)}{6.8}}+3.56e^{0.079V}+310000e^{0.35V}} & \text{otherwise}\end{cases}$ $\frac{\mathrm{j\_infinity}-j}{\mathrm{tau\_j}}$ $\frac{1}{1+e^{\frac{V+76.1}{6.07}}}$ $\begin{cases}\frac{0.01163(1+e^{-0.1(V+32)})}{e^{-2.535E-7V}} & \text{if $V\ge -40$}\\ \frac{0.00349}{\frac{V+37.78}{1+e^{0.311(V+79.23)}}(-127140e^{0.2444V}-3.474E-5e^{-0.04391V})+\frac{0.1212e^{-0.01052V}}{1+e^{-0.1378(V+40.14)}}} & \text{otherwise}\end{cases}$ $\mathrm{g\_Na}m^{3}hj(V-\mathrm{E\_Na})$ $\frac{RT}{F}\ln \left(\frac{\mathrm{Na\_o}}{\mathrm{Na\_i}}\right)$ $\frac{\mathrm{d\_infinity}-d}{\mathrm{tau\_d}}$ $\frac{1}{1+e^{\frac{V+15.3}{-5}}}$ $0.00305e^{-0.0045(V+7)^2}+0.00105e^{-0.002(V-18)^2}+0.00025$ $\frac{\mathrm{f\_11\_infinity}-\mathrm{f\_11}}{\mathrm{tau\_f\_11}}$ $\frac{1}{1+e^{\frac{V+26.7}{5.4}}}$ $0.105e^{-\left(\frac{V+45}{12}\right)^2}+\frac{0.04}{1+e^{\frac{-V+25}{25}}}+\frac{0.015}{1+e^{\frac{V+75}{25}}}+0.0017$ $\frac{\mathrm{f\_12\_infinity}-\mathrm{f\_12}}{\mathrm{tau\_f\_12}}$ $\frac{1}{1+e^{\frac{V+26.7}{5.4}}}$ $0.041e^{-\left(\frac{V+47}{12}\right)^2}+\frac{0.08}{1+e^{\frac{V+55}{-5}}}+\frac{0.015}{1+e^{\frac{V+75}{25}}}+0.0017$ $\frac{\mathrm{Ca\_inact\_infinity}-\mathrm{Ca\_inact}}{\mathrm{tau\_Ca\_inact}}$ $\frac{1}{1+\frac{\mathrm{Ca\_ss}}{0.01}}$ $\mathrm{g\_Ca\_L}d((0.9+\frac{\mathrm{Ca\_inact}}{10})\mathrm{f\_11}-0.1\mathrm{f\_12})(V-\mathrm{E\_Ca\_L})$ $\frac{\mathrm{r\_infinity}-r}{\mathrm{tau\_r}}$ $\frac{1}{45.16e^{0.03577(V+50)}+98.9e^{-0.1(V+38)}}$ $\frac{1}{1+e^{\frac{V+10.6}{-11.42}}}$ $\frac{\mathrm{s\_infinity}-s}{\mathrm{tau\_s}}$ $0.35e^{-\left(\frac{V+70}{15}\right)^2}+0.035$ $\frac{1}{1+e^{\frac{V+45.3}{6.8841}}}$ $\frac{\mathrm{s\_slow\_infinity}-\mathrm{s\_slow}}{\mathrm{tau\_s\_slow}}$ $3.7e^{-\left(\frac{V+70}{30}\right)^2}+0.035$ $\frac{1}{1+e^{\frac{V+45.3}{6.8841}}}$ $\mathrm{g\_t}r(as+b\mathrm{s\_slow})(V-\mathrm{E\_K})$ $\frac{RT}{F}\ln \left(\frac{\mathrm{K\_o}}{\mathrm{K\_i}}\right)$ $\frac{\mathrm{r\_ss\_infinity}-\mathrm{r\_ss}}{\mathrm{tau\_r\_ss}}$ $\frac{10}{45.16e^{0.03577(V+50)}+98.9e^{-0.1(V+38)}}$ $\frac{1}{1+e^{\frac{V+11.5}{-11.82}}}$ $\frac{\mathrm{s\_ss\_infinity}-\mathrm{s\_ss}}{\mathrm{tau\_s\_ss}}$ $2.1$ $\frac{1}{1+e^{\frac{V+87.5}{10.3}}}$ $\mathrm{g\_ss}\mathrm{r\_ss}\mathrm{s\_ss}(V-\mathrm{E\_K})$ $\frac{(\frac{48}{e^{\frac{V+37}{25}}+e^{\frac{V+37}{-25}}}+10)\times 0.001}{1+e^{\frac{V-\mathrm{E\_K}+76.77}{-17}}}+\frac{\mathrm{g\_K1}(V-\mathrm{E\_K}+1.73)}{(1+e^{\frac{1.613F(V-\mathrm{E\_K}+1.73)}{RT}})(1+e^{\frac{\mathrm{K\_o}-0.9988}{-0.124}})}$ $\frac{\mathrm{y\_infinity}-y}{\mathrm{tau\_y}}$ $\frac{1}{0.11885e^{\frac{V+80}{28.37}}+0.5623e^{\frac{V+80}{-14.19}}}$ $\frac{1}{1+e^{\frac{V+138.6}{10.48}}}$ $\mathrm{i\_f\_Na}+\mathrm{i\_f\_K}$ $\mathrm{g\_f}y\mathrm{f\_Na}(V-\mathrm{E\_Na})$ $\mathrm{g\_f}y\mathrm{f\_K}(V-\mathrm{E\_K})$ $1-\mathrm{f\_Na}$ $\mathrm{i\_B\_Na}+\mathrm{i\_B\_Ca}+\mathrm{i\_B\_K}$ $\mathrm{g\_B\_Na}(V-\mathrm{E\_Na})$ $\mathrm{g\_B\_Ca}(V-\mathrm{E\_Ca})$ $\mathrm{g\_B\_K}(V-\mathrm{E\_K})$ $\frac{0.5RT}{F}\ln \left(\frac{\mathrm{Ca\_o}}{\mathrm{Ca\_i}}\right)$ $\frac{\frac{\frac{\mathrm{i\_NaK\_max}\times 1}{1+0.1245e^{\frac{-0.1VF}{RT}}+0.0365\mathrm{sigma}e^{\frac{-VF}{RT}}}\mathrm{K\_o}}{\mathrm{K\_o}+\mathrm{K\_m\_K}}\times 1}{1+\left(\frac{\mathrm{K\_m\_Na}}{\mathrm{Na\_i}}\right)^{1.5}}$ $\frac{e^{\frac{\mathrm{Na\_o}}{67.3}}-1}{7}$ $\frac{\mathrm{i\_Ca\_P\_max}\mathrm{Ca\_i}}{\mathrm{Ca\_i}+0.0004}$ $\frac{\mathrm{K\_NaCa}(\mathrm{Na\_i}^3\mathrm{Ca\_o}e^{0.03743V\mathrm{gamma\_NaCa}}-\mathrm{Na\_o}^3\mathrm{Ca\_i}e^{0.03743V(\mathrm{gamma\_NaCa}-1)})}{1+\mathrm{d\_NaCa}(\mathrm{Ca\_i}\mathrm{Na\_o}^3+\mathrm{Ca\_o}\mathrm{Na\_i}^3)}$ $\mathrm{v1}(\mathrm{P\_O1}+\mathrm{P\_O2})(\mathrm{Ca\_JSR}-\mathrm{Ca\_ss})$ $\mathrm{k\_a\_plus}\left(\frac{\mathrm{Ca\_ss}}{1}\right)^n\mathrm{P\_C1}-\mathrm{k\_a\_minus}\mathrm{P\_O1}+\mathrm{k\_b\_plus}\left(\frac{\mathrm{Ca\_ss}}{1}\right)^m\mathrm{P\_O1}+\mathrm{k\_c\_plus}\mathrm{P\_O1}+\mathrm{k\_b\_minus}\mathrm{P\_O2}+\mathrm{k\_c\_minus}\mathrm{P\_C2}$ $\mathrm{k\_b\_plus}\left(\frac{\mathrm{Ca\_ss}}{1}\right)^m\mathrm{P\_O1}-\mathrm{k\_b\_minus}\mathrm{P\_O2}$ $\mathrm{k\_a\_plus}\left(\frac{\mathrm{Ca\_ss}}{1}\right)^n\mathrm{P\_C1}+\mathrm{k\_a\_minus}\mathrm{P\_O1}$ $\mathrm{k\_c\_plus}\mathrm{P\_O1}-\mathrm{k\_c\_minus}\mathrm{P\_C2}$ $\frac{\mathrm{K\_SR}(\mathrm{Vmaxf}\mathrm{fb}-\mathrm{Vmaxr}\mathrm{rb})}{1+\mathrm{fb}+\mathrm{rb}}$ $\left(\frac{\mathrm{Ca\_i}}{\mathrm{K\_fb}}\right)^{\mathrm{N\_fb}}$ $\left(\frac{\mathrm{Ca\_NSR}}{\mathrm{K\_rb}}\right)^{\mathrm{N\_rb}}$ $\frac{\mathrm{Ca\_NSR}-\mathrm{Ca\_JSR}}{\mathrm{tau\_tr}}$ $\frac{\mathrm{Ca\_ss}-\mathrm{Ca\_i}}{\mathrm{tau\_xfer}}$ $\mathrm{J\_HTRPNCa}+\mathrm{J\_LTRPNCa}$ $\mathrm{k\_htrpn\_plus}\mathrm{Ca\_i}(\mathrm{HTRPN\_tot}-\mathrm{HTRPNCa})-\mathrm{k\_htrpn\_minus}\mathrm{HTRPNCa}$ $\mathrm{k\_ltrpn\_plus}\mathrm{Ca\_i}(\mathrm{LTRPN\_tot}-\mathrm{LTRPNCa})-\mathrm{k\_ltrpn\_minus}\mathrm{LTRPNCa}$ $\frac{-(\mathrm{i\_Na}+\mathrm{i\_B\_Na}+\mathrm{i\_NaCa}\times 3+\mathrm{i\_NaK}\times 3+\mathrm{i\_f\_Na})\times 1}{\mathrm{V\_myo}F}$ $\mathrm{beta\_i}(\mathrm{J\_xfer}-\mathrm{J\_up}+\mathrm{J\_trpn}+\frac{(\mathrm{i\_B\_Ca}-2\mathrm{i\_NaCa}+\mathrm{i\_Ca\_P})\times 1}{2\mathrm{V\_myo}F})$ $\frac{-(\mathrm{i\_ss}+\mathrm{i\_B\_K}+\mathrm{i\_t}+\mathrm{i\_K1}+\mathrm{i\_f\_K}+\mathrm{i\_NaK}\times -2)\times 1}{\mathrm{V\_myo}F}$ $\mathrm{beta\_SS}(\frac{\mathrm{J\_rel}\mathrm{V\_JSR}}{\mathrm{V\_SS}}-\frac{\mathrm{J\_xfer}\mathrm{V\_myo}}{\mathrm{V\_SS}}-\frac{\mathrm{i\_Ca\_L}\times 1}{2\mathrm{V\_SS}F})$ $\mathrm{beta\_JSR}(\mathrm{J\_tr}-\mathrm{J\_rel})$ $\frac{\mathrm{J\_up}\mathrm{V\_myo}}{\mathrm{V\_NSR}}-\frac{\mathrm{J\_tr}\mathrm{V\_JSR}}{\mathrm{V\_NSR}}$ $\frac{1}{1+\frac{\mathrm{CMDN\_tot}\mathrm{K\_mCMDN}}{(\mathrm{K\_mCMDN}+\mathrm{Ca\_i})^2}+\frac{\mathrm{EGTA\_tot}\mathrm{K\_mEGTA}}{(\mathrm{K\_mEGTA}+\mathrm{Ca\_i})^2}}$ $\frac{1}{1+\frac{\mathrm{CMDN\_tot}\mathrm{K\_mCMDN}}{(\mathrm{K\_mCMDN}+\mathrm{Ca\_ss})^2}}$ $\frac{1}{1+\frac{\mathrm{CSQN\_tot}\mathrm{K\_mCSQN}}{(\mathrm{K\_mCSQN}+\mathrm{Ca\_JSR})^2}}$ $\begin{cases}1E-7 & \text{if $\left|\mathrm{VmReal}\right|< 1E-7$}\\ \mathrm{VmReal} & \text{otherwise}\end{cases}$ $\frac{-(\mathrm{I\_Kir}+\mathrm{I\_Shkr}+\mathrm{I\_b}+\mathrm{I\_inter})}{\mathrm{Cm}}$ $\mathrm{GKir}\mathrm{OKir}\sqrt{\mathrm{Ko}\times 1E-3}(\mathrm{V\_fibro}-\mathrm{EK})$ $\frac{RT}{F}\ln \left(\frac{\mathrm{Ko}}{\mathrm{Ki}}\right)$ $\frac{1}{\mathrm{aKir}+e^{\frac{\mathrm{bKir}(\mathrm{V\_fibro}-\mathrm{EK})F}{RT}}}$ $\frac{\frac{\mathrm{PShkr}\mathrm{OShkr}\mathrm{V\_fibro}F^2}{RT}(\mathrm{Ki}-\mathrm{Ko}e^{\frac{-\mathrm{V\_fibro}F}{RT}})}{1-e^{\frac{-\mathrm{V\_fibro}F}{RT}}}$ $\mathrm{k\_v}\mathrm{C1Shkr}-4\mathrm{kv}\mathrm{C0Shkr}$ $2\mathrm{k\_v}\mathrm{C2Shkr}+4\mathrm{kv}\mathrm{C0Shkr}-(3\mathrm{kv}+\mathrm{k\_v})\mathrm{C1Shkr}$ $3\mathrm{k\_v}\mathrm{C3Shkr}+3\mathrm{kv}\mathrm{C1Shkr}-(2\mathrm{kv}+2\mathrm{k\_v})\mathrm{C2Shkr}$ $4\mathrm{k\_v}\mathrm{C4Shkr}+2\mathrm{kv}\mathrm{C2Shkr}-(\mathrm{kv}+3\mathrm{k\_v})\mathrm{C3Shkr}$ $\mathrm{k\_o}\mathrm{OShkr}+\mathrm{kv}\mathrm{C3Shkr}-(\mathrm{ko}+4\mathrm{k\_v})\mathrm{C4Shkr}$ $\mathrm{ko}\mathrm{C4Shkr}-\mathrm{k\_o}\mathrm{OShkr}$ $\begin{cases}0 & \text{if $\mathrm{C0ShkrReal}< 0$}\\ 1 & \text{if $\mathrm{C0ShkrReal}> 1$}\\ \mathrm{C0ShkrReal} & \text{otherwise}\end{cases}$ $\begin{cases}0 & \text{if $\mathrm{C1ShkrReal}< 0$}\\ 1 & \text{if $\mathrm{C1ShkrReal}> 1$}\\ \mathrm{C1ShkrReal} & \text{otherwise}\end{cases}$ $\begin{cases}0 & \text{if $\mathrm{C2ShkrReal}< 0$}\\ 1 & \text{if $\mathrm{C2ShkrReal}> 1$}\\ \mathrm{C2ShkrReal} & \text{otherwise}\end{cases}$ $\begin{cases}0 & \text{if $\mathrm{C3ShkrReal}< 0$}\\ 1 & \text{if $\mathrm{C3ShkrReal}> 1$}\\ \mathrm{C3ShkrReal} & \text{otherwise}\end{cases}$ $\begin{cases}0 & \text{if $\mathrm{C4ShkrReal}< 0$}\\ 1 & \text{if $\mathrm{C4ShkrReal}> 1$}\\ \mathrm{C4ShkrReal} & \text{otherwise}\end{cases}$ $\begin{cases}0 & \text{if $\mathrm{OShkrReal}< 0$}\\ 1 & \text{if $\mathrm{OShkrReal}> 1$}\\ \mathrm{OShkrReal} & \text{otherwise}\end{cases}$ $\mathrm{kv0}e^{\frac{\mathrm{V\_fibro}\mathrm{zv}F}{RT}}$ $\mathrm{k\_v0}e^{\frac{\mathrm{V\_fibro}\mathrm{z\_v}F}{RT}}$ $\mathrm{Gb}(\mathrm{V\_fibro}-\mathrm{Eb})$ $\frac{1E6(\mathrm{V\_fibro}-V)}{\mathrm{R\_mf}}$ $-1\mathrm{I\_inter\_fibro}\mathrm{number\_of\_fibroblasts}$