$\frac{-1}{\mathrm{Cm}}(\mathrm{i\_Stim}+\mathrm{i\_K1}+\mathrm{i\_to}+\mathrm{i\_K}+\mathrm{i\_NaK}+\mathrm{i\_Na}+\mathrm{i\_b\_Na}+\mathrm{i\_Ca\_L\_Na\_cyt}+\mathrm{i\_Ca\_L\_Na\_ds}+\mathrm{i\_NaCa\_cyt}+\mathrm{i\_NaCa\_ds}+\mathrm{i\_Ca\_L\_Ca\_cyt}+\mathrm{i\_Ca\_L\_Ca\_ds}+\mathrm{i\_Ca\_L\_K\_cyt}+\mathrm{i\_Ca\_L\_K\_ds}+\mathrm{i\_b\_Ca}+\mathrm{i\_b\_K})$ $\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}$ $\frac{RT}{F}\ln \left(\frac{\mathrm{Na\_o}}{\mathrm{Na\_i}}\right)$ $\frac{RT}{F}\ln \left(\frac{\mathrm{K\_o}}{\mathrm{K\_i}}\right)$ $\frac{0.5RT}{F}\ln \left(\frac{\mathrm{Ca\_o}}{\mathrm{Ca\_i}}\right)$ $\frac{RT}{F}\ln \left(\frac{\mathrm{Na\_o}+0.12\mathrm{K\_o}}{\mathrm{Na\_i}+0.12\mathrm{K\_i}}\right)$ $\frac{\frac{\mathrm{g\_K1}\mathrm{K\_o}}{\mathrm{K\_o}+\mathrm{K\_mk1}}(V-\mathrm{E\_K})}{1+e^{\frac{(V-\mathrm{E\_K}+10)F\times 1.67}{RT}}}$ $\mathrm{alpha\_x}(1-x)-\mathrm{beta\_x}x$ $\begin{cases}2.5 & \text{if $\left|\mathrm{E0\_x}\right|< \mathrm{delta\_x}$}\\ \frac{3\times 0.5\mathrm{E0\_x}}{1-e^{\frac{-\mathrm{E0\_x}}{5}}} & \text{otherwise}\end{cases}$ $\begin{cases}2.5 & \text{if $\left|\mathrm{E0\_x}\right|< \mathrm{delta\_x}$}\\ \frac{3\times 0.178\mathrm{E0\_x}}{e^{\frac{\mathrm{E0\_x}}{15}}-1} & \text{otherwise}\end{cases}$ $V+22-40$ $x\mathrm{I\_K}$ $\frac{\mathrm{i\_K\_max}(\mathrm{K\_i}-\mathrm{K\_o}e^{\frac{-VF}{RT}})}{140}$ $\mathrm{alpha\_m}(1-m)-\mathrm{beta\_m}m$ $\begin{cases}2000 & \text{if $\left|\mathrm{E0\_m}\right|< \mathrm{delta\_m}$}\\ \frac{200\mathrm{E0\_m}}{1-e^{-0.1\mathrm{E0\_m}}} & \text{otherwise}\end{cases}$ $8000e^{-0.056(V+66)}$ $V+41$ $\mathrm{alpha\_h}(1-h)-\mathrm{beta\_h}h$ $20e^{-0.125(V+75-\mathrm{shift\_h})}$ $\frac{2000}{1+320e^{-0.1(V+75-\mathrm{shift\_h})}}$ $\mathrm{g\_Na}m^{3}h(V-\mathrm{E\_mh})$ $\mathrm{g\_bna}(V-\mathrm{E\_Na})$ $\mathrm{g\_bk}(V-\mathrm{E\_K})$ $\mathrm{speed\_d}(\mathrm{alpha\_d}(1-d)-\mathrm{beta\_d}d)$ $\begin{cases}120 & \text{if $\left|\mathrm{E0\_d}\right|< 0.0001$}\\ \frac{30\mathrm{E0\_d}}{1-e^{\frac{-\mathrm{E0\_d}}{3}}} & \text{otherwise}\end{cases}$ $\begin{cases}120 & \text{if $\left|\mathrm{E0\_d}\right|< 0.0001$}\\ \frac{12\mathrm{E0\_d}}{e^{\frac{\mathrm{E0\_d}}{7.5}}-1} & \text{otherwise}\end{cases}$ $V+24-20$ $\mathrm{speed\_f}(\mathrm{alpha\_f}(1-f)-\mathrm{beta\_f}f)$ $\begin{cases}25 & \text{if $\left|\mathrm{E0\_f}\right|< \mathrm{delta\_f}$}\\ \frac{6.25\mathrm{E0\_f}}{e^{\frac{\mathrm{E0\_f}}{5.5}}-1} & \text{otherwise}\end{cases}$ $\frac{12}{1+e^{\frac{-1(V+34)}{5.5}}}$ $V+34-10$ $1-1(\frac{\mathrm{Ca\_i}}{\mathrm{Km\_f2}+\mathrm{Ca\_i}}+\mathrm{f2})$ $\mathrm{R\_decay}(1-\frac{\mathrm{Ca\_ds}}{\mathrm{Km\_f2ds}+\mathrm{Ca\_ds}}+\mathrm{f2ds})$ $\frac{\frac{(1-\mathrm{FrICa})\times 4\mathrm{P\_Ca\_L}df\mathrm{f2}(V-50)F}{RT}}{1-e^{\frac{-(V-50)F\times 2}{RT}}}(\mathrm{Ca\_i}e^{\frac{100F}{RT}}-\mathrm{Ca\_o}e^{\frac{-(V-50)F\times 2}{RT}})$ $\frac{\frac{(1-\mathrm{FrICa})\mathrm{P\_CaK}\mathrm{P\_Ca\_L}df\mathrm{f2}(V-50)F}{RT}}{1-e^{\frac{-(V-50)F}{RT}}}(\mathrm{K\_i}e^{\frac{50F}{RT}}-\mathrm{K\_o}e^{\frac{-(V-50)F}{RT}})$ $\frac{\frac{(1-\mathrm{FrICa})\mathrm{P\_CaNa}\mathrm{P\_Ca\_L}df\mathrm{f2}(V-50)F}{RT}}{1-e^{\frac{-(V-50)F}{RT}}}(\mathrm{Na\_i}e^{\frac{50F}{RT}}-\mathrm{Na\_o}e^{\frac{-(V-50)F}{RT}})$ $\frac{\frac{\mathrm{FrICa}\times 4\mathrm{P\_Ca\_L}df\mathrm{f2ds}(V-50)F}{RT}}{1-e^{\frac{-(V-50)F\times 2}{RT}}}(\mathrm{Ca\_i}e^{\frac{100F}{RT}}-\mathrm{Ca\_o}e^{\frac{-(V-50)F\times 2}{RT}})$ $\frac{\frac{\mathrm{FrICa}\mathrm{P\_CaK}\mathrm{P\_Ca\_L}df\mathrm{f2ds}(V-50)F}{RT}}{1-e^{\frac{-(V-50)F}{RT}}}(\mathrm{K\_i}e^{\frac{50F}{RT}}-\mathrm{K\_o}e^{\frac{-(V-50)F}{RT}})$ $\frac{\frac{\mathrm{FrICa}\mathrm{P\_CaNa}\mathrm{P\_Ca\_L}df\mathrm{f2ds}(V-50)F}{RT}}{1-e^{\frac{-(V-50)F}{RT}}}(\mathrm{Na\_i}e^{\frac{50F}{RT}}-\mathrm{Na\_o}e^{\frac{-(V-50)F}{RT}})$ $\mathrm{i\_Ca\_L\_Ca\_cyt}+\mathrm{i\_Ca\_L\_K\_cyt}+\mathrm{i\_Ca\_L\_Na\_cyt}+\mathrm{i\_Ca\_L\_Ca\_ds}+\mathrm{i\_Ca\_L\_K\_ds}+\mathrm{i\_Ca\_L\_Na\_ds}$ $\mathrm{g\_bca}(V-\mathrm{E\_Ca})$ $\mathrm{alpha\_s}(1-s)-\mathrm{beta\_s}s$ $0.26\times 0.033e^{\frac{-V}{14.875}}$ $\frac{0.26\times 33}{1+e^{\frac{-(V+10)}{7}}}$ $333(\frac{1}{1+e^{\frac{-(V+4-24)}{10}}}-r)$ $\mathrm{g\_to}(\mathrm{g\_tos}+s(1-\mathrm{g\_tos}))r(V-\mathrm{E\_K})$ $\frac{\frac{\mathrm{i\_NaK\_max}\mathrm{K\_o}}{\mathrm{K\_mK}+\mathrm{K\_o}}\mathrm{Na\_i}}{\mathrm{K\_mNa}+\mathrm{Na\_i}}$ $\mathrm{i\_NaCa\_cyt}+\mathrm{i\_NaCa\_ds}$ $\frac{(1-\mathrm{FRiNaCa})\mathrm{k\_NaCa}(e^{\frac{\mathrm{gamma}(\mathrm{n\_NaCa}-2)VF}{RT}}\mathrm{Na\_i}^{\mathrm{n\_NaCa}}\mathrm{Ca\_o}-e^{\frac{(\mathrm{gamma}-1)(\mathrm{n\_NaCa}-2)VF}{RT}}\mathrm{Na\_o}^{\mathrm{n\_NaCa}}\mathrm{Ca\_i})}{(1+\mathrm{d\_NaCa}(\mathrm{Ca\_i}\mathrm{Na\_o}^{\mathrm{n\_NaCa}}+\mathrm{Ca\_o}\mathrm{Na\_i}^{\mathrm{n\_NaCa}}))(1+\frac{\mathrm{Ca\_i}}{0.0069})}$ $\frac{\mathrm{FRiNaCa}\mathrm{k\_NaCa}(e^{\frac{\mathrm{gamma}(\mathrm{n\_NaCa}-2)VF}{RT}}\mathrm{Na\_i}^{\mathrm{n\_NaCa}}\mathrm{Ca\_o}-e^{\frac{(\mathrm{gamma}-1)(\mathrm{n\_NaCa}-2)VF}{RT}}\mathrm{Na\_o}^{\mathrm{n\_NaCa}}\mathrm{Ca\_ds})}{(1+\mathrm{d\_NaCa}(\mathrm{Ca\_ds}\mathrm{Na\_o}^{\mathrm{n\_NaCa}}+\mathrm{Ca\_o}\mathrm{Na\_i}^{\mathrm{n\_NaCa}}))(1+\frac{\mathrm{Ca\_ds}}{0.0069})}$ $\frac{\mathrm{Ca\_i}}{\mathrm{K\_2}}\mathrm{alpha\_up}-\frac{\mathrm{Ca\_up}\mathrm{K\_1}}{\mathrm{K\_2}}\mathrm{beta\_up}$ $\frac{\mathrm{K\_cyca}\mathrm{K\_xcs}}{\mathrm{K\_srca}}$ $\mathrm{Ca\_i}+\mathrm{Ca\_up}\mathrm{K\_1}+\mathrm{K\_cyca}\mathrm{K\_xcs}+\mathrm{K\_cyca}$ $50(\mathrm{Ca\_up}-\mathrm{Ca\_rel})$ $(\left(\frac{\mathrm{ActFrac}}{\mathrm{ActFrac}+0.25}\right)^2\mathrm{K\_m\_rel}+\mathrm{K\_leak\_rate})\mathrm{Ca\_rel}$ $e^{0.08(V-40)}$ $\mathrm{CaiReg}-1\mathrm{CadsReg}$ $\frac{\mathrm{Ca\_i}}{\mathrm{Ca\_i}+\mathrm{K\_m\_Ca\_cyt}}$ $\frac{\mathrm{Ca\_ds}}{\mathrm{Ca\_ds}+\mathrm{K\_m\_Ca\_ds}}$ $0\mathrm{VoltDep}+500\mathrm{RegBindSite}^2$ $60+500\mathrm{RegBindSite}^2$ $1-\mathrm{ActFrac}-\mathrm{ProdFrac}$ $\mathrm{PrecFrac}\mathrm{SpeedRel}\mathrm{ActRate}-\mathrm{ActFrac}\mathrm{SpeedRel}\mathrm{InactRate}$ $\mathrm{ActFrac}\mathrm{SpeedRel}\mathrm{InactRate}-\mathrm{SpeedRel}\times 1\mathrm{ProdFrac}$ $\begin{cases}5 & \text{if $V< -50$}\\ 1 & \text{otherwise}\end{cases}$ $\frac{-1}{1\mathrm{V\_i}F}(\mathrm{i\_Na}+\mathrm{i\_b\_Na}+3\mathrm{i\_NaK}+3\mathrm{i\_NaCa\_cyt}+\mathrm{i\_Ca\_L\_Na\_cyt}+\mathrm{i\_Ca\_L\_Na\_ds})$ $\frac{1(\mathrm{i\_K1}+\mathrm{i\_to}+\mathrm{i\_Ca\_L\_K\_cyt}+\mathrm{i\_Ca\_L\_K\_ds}-2\mathrm{i\_NaK}+\mathrm{i\_K}+\mathrm{i\_b\_K})}{1\mathrm{V\_e}F}-\mathrm{pf}(\mathrm{K\_o}-\mathrm{K\_b})$ $\frac{-1}{1\mathrm{V\_i}F}(\mathrm{i\_K1}+\mathrm{i\_K}+\mathrm{i\_Ca\_L\_K\_cyt}+\mathrm{i\_Ca\_L\_K\_ds}+\mathrm{i\_to}+\mathrm{i\_b\_K}-2\mathrm{i\_NaK})$ $\frac{-1}{2\times 1\mathrm{V\_i}F}(\mathrm{i\_Ca\_L\_Ca\_cyt}+\mathrm{i\_b\_Ca}-2\mathrm{i\_NaCa\_cyt})+\mathrm{Ca\_ds}\mathrm{V\_ds\_ratio}\mathrm{Kdecay}+\frac{\mathrm{i\_rel}\mathrm{V\_rel\_ratio}}{\mathrm{V\_i\_ratio}}-\frac{d(\mathrm{Ca\_Calmod})}{d(\mathrm{unknown}-\mathrm{element})}-\frac{d(\mathrm{Ca\_Trop})}{d(\mathrm{unknown}-\mathrm{element})}-\mathrm{i\_up}$ $\frac{-1\mathrm{i\_Ca\_L\_Ca\_ds}}{2\mathrm{V\_ds\_ratio}\times 1\mathrm{V\_i}F}-\mathrm{Ca\_ds}\mathrm{Kdecay}$ $\frac{\mathrm{V\_i\_ratio}}{\mathrm{V\_up\_ratio}}\mathrm{i\_up}-\mathrm{i\_trans}$ $\frac{\mathrm{V\_up\_ratio}}{\mathrm{V\_rel\_ratio}}\mathrm{i\_trans}-\mathrm{i\_rel}$ $\mathrm{alpha\_Calmod}\mathrm{Ca\_i}(\mathrm{Calmod}-\mathrm{Ca\_Calmod})-\mathrm{beta\_Calmod}\mathrm{Ca\_Calmod}$ $\mathrm{alpha\_Trop}\mathrm{Ca\_i}(\mathrm{Trop}-\mathrm{Ca\_Trop})-\mathrm{beta\_Trop}\mathrm{Ca\_Trop}$ $\mathrm{V\_Cell}\mathrm{V\_i\_ratio}$ $\mathrm{V\_Cell}\mathrm{V\_e\_ratio}$ $\frac{3.141592654\left(\frac{\mathrm{radius}}{1000}\right)^2\mathrm{length}}{1000}$ $1-\mathrm{V\_e\_ratio}-\mathrm{V\_up\_ratio}-\mathrm{V\_rel\_ratio}$