$\frac{\mathrm{Istim}-\mathrm{i\_Na}+\mathrm{i\_s}+\mathrm{i\_x1}+\mathrm{i\_K1}}{C}$ $\mathrm{alpha\_m}(1-m)-\mathrm{beta\_m}m$ $\frac{-1(V+47)}{e^{-0.1(V+47)}-1}$ $40e^{-0.056(V+72)}$ $\mathrm{alpha\_h}(1-h)-\mathrm{beta\_h}h$ $0.126e^{-0.25(V+77)}$ $\frac{1.7}{e^{-0.082(V+22.5)}+1}$ $\mathrm{alpha\_j}(1-j)-\mathrm{beta\_j}j$ $\frac{0.055e^{-0.25(V+78)}}{e^{-0.2(V+78)}+1}$ $\frac{0.3}{e^{-0.1(V+32)}+1}$ $(\mathrm{g\_Na}m^{3}hj+\mathrm{g\_Nac})(V-\mathrm{E\_Na})$ $\mathrm{alpha\_d}(1-d)-\mathrm{beta\_d}d$ $\frac{0.095e^{\frac{-(V-5)}{100}}}{1+e^{\frac{-(V-5)}{13.89}}}$ $\frac{0.07e^{\frac{-(V+44)}{59}}}{1+e^{\frac{V+44}{20}}}$ $\mathrm{alpha\_f}(1-f)-\mathrm{beta\_f}f$ $\frac{0.012e^{\frac{-(V+28)}{125}}}{1+e^{\frac{V+28}{6.67}}}$ $\frac{0.0065e^{\frac{-(V+30)}{50}}}{1+e^{\frac{-(V+30)}{5}}}$ $\mathrm{g\_s}df(V-\mathrm{E\_s})$ $-82.3-13.0287\ln (\mathrm{Cai}\times 0.001)$ $\frac{-0.01\mathrm{i\_s}}{1}+0.07(0.0001-\mathrm{Cai})$ $\mathrm{alpha\_x1}(1-\mathrm{x1})-\mathrm{beta\_x1}\mathrm{x1}$ $\frac{5E-4e^{\frac{V+50}{12.1}}}{1+e^{\frac{V+50}{17.5}}}$ $\frac{0.0013e^{\frac{-(V+20)}{16.67}}}{1+e^{\frac{-(V+20)}{25}}}$ $\frac{\mathrm{x1}\times 8E-3(e^{0.04(V+77)}-1)}{e^{0.04(V+35)}}$ $0.0035(\frac{4(e^{0.04(V+85)}-1)}{e^{0.08(V+53)}+e^{0.04(V+53)}}+\frac{0.2(V+23)}{1-e^{-0.04(V+23)}})$ $\begin{cases}\mathrm{IstimAmplitude} & \text{if $(\mathrm{time\_}\ge \mathrm{IstimStart})\land (\mathrm{time\_}\le \mathrm{IstimEnd})\land (\mathrm{time\_}-\mathrm{IstimStart}-\lfloor \frac{\mathrm{time\_}-\mathrm{IstimStart}}{\mathrm{IstimPeriod}}\rfloor \mathrm{IstimPeriod}\le \mathrm{IstimPulseDuration})$}\\ 0 & \text{otherwise}\end{cases}$