- Author:
- nhen534 <devnull@localhost>
- Date:
- 2014-12-01 16:31:09+13:00
- Desc:
- Updated annotations for both a and b .cellml files
- Permanent Source URI:
- https://models.physiomeproject.org/workspace/noble_2000/rawfile/cad7d0e0eae86a2c897ac051b5757df0258ee530/noble_2000_b.cellml
<?xml version='1.0'?>
<!--
This CellML file was generated on 22/09/2008 at 11:46:10 using:
COR (0.9.31.1033)
Copyright 2002-2008 Dr Alan Garny
http://COR.physiol.ox.ac.uk/ - COR@physiol.ox.ac.uk
CellML 1.0 was used to generate this model
http://www.CellML.org/
-->
<model cmeta:id="noble_2000b" name="noble_2000b" xmlns="http://www.cellml.org/cellml/1.0#" xmlns:bqs="http://www.cellml.org/bqs/1.0#" xmlns:cellml="http://www.cellml.org/cellml/1.0#" xmlns:cmeta="http://www.cellml.org/metadata/1.0#" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:ns7="http://www.cellml.org/metadata/simulation/1.0#" xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:vCard="http://www.w3.org/2001/vcard-rdf/3.0#">
<documentation xmlns="http://cellml.org/tmp-documentation">
<article>
<articleinfo>
<title>A model of the guinea-pig ventricular cardiac myocyte incorporating a transverse-axial tubular system</title>
<author>
<firstname>Catherine</firstname>
<surname>Lloyd</surname>
<affiliation>
<shortaffil>Auckland Bioengineering Institute, The University of Auckland</shortaffil>
</affiliation>
</author>
</articleinfo>
<section id="sec_status">
<title>Model Status</title>
<para>
This CellML model is known to run in both COR and PCEnv to recreate the original results. The units have been checked and they are consistent. This particular version of the model has multiple stimuli between 200s and 600s.</para>
</section>
<sect1 id="sec_structure">
<title>Model Structure</title>
<para>This CellML model is a description of the Noble 2000 (N2K) guinea pig ventricular cell model. N2K is an updated version of the model published by Noble et al. in 1998, in which the voltage-sensitive L-type Ca2+ current (ICaL) and the Ca2+ dynamics have been refined.</para>
<para>
Noble, Carghese, Kohl and Noble's 1998 guinea pig ventricular cell model incorporates a diadic space, IKr and IKs currents, and length and tension dependent processes. To simulate multiple action potentials with this model the following integrator parameters must be used: max step size must be 0.001 or less, max point density must be 10,000 or more.</para>
<para>
The original 1998 paper reference is cited below:
</para>
<para>
Improved guinea-pig ventricular cell model incorporating a diadic space, I<subscript>Kr</subscript> and I<subscript>Ks</subscript>, and length- and tension-dependent processes, Denis Noble, Anthony Varghese, Peter Kohl and Penelope Noble, 1998,
<emphasis>Can J Cardiol</emphasis>
, 14, 123-134. <ulink url="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=9487284&dopt=Abstract">PubMed ID: 9487284</ulink>
</para>
<para>
Paper reference is in which the current model is described:
</para>
<para>
Cellular Open Resource (COR): current status and future directions. Alan Garny, Denis Noble, Peter J. Hunter and Peter Kohl, 2009, <emphasis>Philisophical Transactions of the Royal Society</emphasis> (accepted)
</para>
<informalfigure float="0" id="fig_cell_diagram">
<mediaobject>
<imageobject>
<imagedata fileref="noble_1998.png"/>
</imageobject>
</mediaobject>
<caption>A schematic diagram describing the current flows across the cell membrane that are captured in the Noble'98 model.</caption>
</informalfigure>
</sect1>
</article>
</documentation>
<units name="micrometre">
<unit prefix="micro" units="metre"/>
</units>
<units name="per_second">
<unit exponent="-1" units="second"/>
</units>
<units name="millivolt">
<unit prefix="milli" units="volt"/>
</units>
<units name="per_millivolt">
<unit exponent="-1" prefix="milli" units="volt"/>
</units>
<units name="per_millivolt_second">
<unit exponent="-1" units="millivolt"/>
<unit exponent="-1" units="second"/>
</units>
<units name="microS">
<unit prefix="micro" units="siemens"/>
</units>
<units name="microF">
<unit prefix="micro" units="farad"/>
</units>
<units name="nanoA">
<unit prefix="nano" units="ampere"/>
</units>
<units name="mA_nA">
<unit prefix="milli" units="ampere"/>
<unit exponent="-1" units="nanoA"/>
</units>
<units name="nanoA_per_millimolar">
<unit prefix="nano" units="ampere"/>
<unit exponent="-1" units="millimolar"/>
</units>
<units name="millimolar">
<unit prefix="milli" units="mole"/>
<unit exponent="-1" units="litre"/>
</units>
<units name="millimolar4">
<unit exponent="4" units="millimolar"/>
</units>
<units name="millimolar_per_second">
<unit units="millimolar"/>
<unit exponent="-1" units="second"/>
</units>
<units name="per_millimolar_second">
<unit exponent="-1" units="millimolar"/>
<unit exponent="-1" units="second"/>
</units>
<units name="joule_per_kilomole_kelvin">
<unit units="joule"/>
<unit exponent="-1" prefix="kilo" units="mole"/>
<unit exponent="-1" units="kelvin"/>
</units>
<units name="coulomb_per_mole">
<unit units="coulomb"/>
<unit exponent="-1" units="mole"/>
</units>
<units name="micrometre3">
<unit exponent="3" prefix="micro" units="metre"/>
</units>
<units name="litre_micrometre3">
<unit units="litre"/>
<unit exponent="-1" units="micrometre3"/>
</units>
<component name="environment">
<variable name="time" public_interface="out" units="second"/>
</component>
<component cmeta:id="id_00001" name="membrane">
<variable initial_value="-92.8915042" name="V" public_interface="out" units="millivolt"/>
<variable initial_value="8314.472" name="R" public_interface="out" units="joule_per_kilomole_kelvin"/>
<variable initial_value="310" name="T" public_interface="out" units="kelvin"/>
<variable initial_value="96485.3415" name="F" public_interface="out" units="coulomb_per_mole"/>
<variable initial_value="9.5e-5" name="Cm" units="microF"/>
<variable name="time" public_interface="in" units="second"/>
<variable name="i_K1" public_interface="in" units="nanoA"/>
<variable name="i_to" public_interface="in" units="nanoA"/>
<variable name="i_Kr" public_interface="in" units="nanoA"/>
<variable name="i_Ks" public_interface="in" units="nanoA"/>
<variable name="i_Ca_L_K_cyt" public_interface="in" units="nanoA"/>
<variable name="i_Ca_L_K_ds" public_interface="in" units="nanoA"/>
<variable name="i_NaK" public_interface="in" units="nanoA"/>
<variable name="i_Na" public_interface="in" units="nanoA"/>
<variable name="i_b_Na" public_interface="in" units="nanoA"/>
<variable name="i_p_Na" public_interface="in" units="nanoA"/>
<variable name="i_Ca_L_Na_cyt" public_interface="in" units="nanoA"/>
<variable name="i_Ca_L_Na_ds" public_interface="in" units="nanoA"/>
<variable name="i_NaCa_cyt" public_interface="in" units="nanoA"/>
<variable name="i_NaCa_ds" public_interface="in" units="nanoA"/>
<variable name="i_Ca_L_Ca_cyt" public_interface="in" units="nanoA"/>
<variable name="i_Ca_L_Ca_ds" public_interface="in" units="nanoA"/>
<variable name="i_b_Ca" public_interface="in" units="nanoA"/>
<variable name="i_Stim" units="nanoA"/>
<variable initial_value="200" name="stim_start" units="second"/>
<variable initial_value="600" name="stim_end" units="second"/>
<variable initial_value="1" name="stim_period" units="second"/>
<variable initial_value="0.002" name="stim_duration" units="second"/>
<variable initial_value="-6" name="stim_amplitude" units="nanoA"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>i_Stim</ci>
<piecewise>
<piece>
<ci>stim_amplitude</ci>
<apply>
<and/>
<apply>
<geq/>
<ci>time</ci>
<ci>stim_start</ci>
</apply>
<apply>
<leq/>
<ci>time</ci>
<ci>stim_end</ci>
</apply>
<apply>
<leq/>
<apply>
<minus/>
<apply>
<minus/>
<ci>time</ci>
<ci>stim_start</ci>
</apply>
<apply>
<times/>
<apply>
<floor/>
<apply>
<divide/>
<apply>
<minus/>
<ci>time</ci>
<ci>stim_start</ci>
</apply>
<ci>stim_period</ci>
</apply>
</apply>
<ci>stim_period</ci>
</apply>
</apply>
<ci>stim_duration</ci>
</apply>
</apply>
</piece>
<otherwise>
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</otherwise>
</piecewise>
</apply>
<apply>
<eq/>
<apply>
<diff/>
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</bvar>
<ci>V</ci>
</apply>
<apply>
<times/>
<apply>
<divide/>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
</apply>
<ci>Cm</ci>
</apply>
<apply>
<plus/>
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<ci>i_K1</ci>
<ci>i_to</ci>
<ci>i_Kr</ci>
<ci>i_Ks</ci>
<ci>i_NaK</ci>
<ci>i_Na</ci>
<ci>i_b_Na</ci>
<ci>i_p_Na</ci>
<ci>i_Ca_L_Na_cyt</ci>
<ci>i_Ca_L_Na_ds</ci>
<ci>i_NaCa_cyt</ci>
<ci>i_NaCa_ds</ci>
<ci>i_Ca_L_Ca_cyt</ci>
<ci>i_Ca_L_Ca_ds</ci>
<ci>i_Ca_L_K_cyt</ci>
<ci>i_Ca_L_K_ds</ci>
<ci>i_b_Ca</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00019" name="reversal_potentials">
<variable name="E_Na" public_interface="out" units="millivolt"/>
<variable name="E_K" public_interface="out" units="millivolt"/>
<variable name="E_Ks" public_interface="out" units="millivolt"/>
<variable name="E_Ca" public_interface="out" units="millivolt"/>
<variable name="E_mh" public_interface="out" units="millivolt"/>
<variable initial_value="0.03" name="P_kna" units="dimensionless"/>
<variable name="K_o" public_interface="in" units="millimolar"/>
<variable name="Na_o" public_interface="in" units="millimolar"/>
<variable name="K_i" public_interface="in" units="millimolar"/>
<variable name="Na_i" public_interface="in" units="millimolar"/>
<variable name="Ca_o" public_interface="in" units="millimolar"/>
<variable name="Ca_i" public_interface="in" units="millimolar"/>
<variable name="R" public_interface="in" units="joule_per_kilomole_kelvin"/>
<variable name="F" public_interface="in" units="coulomb_per_mole"/>
<variable name="T" public_interface="in" units="kelvin"/>
<variable name="time" public_interface="in" units="second"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>E_Na</ci>
<apply>
<times/>
<apply>
<divide/>
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<times/>
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<ci>T</ci>
</apply>
<ci>F</ci>
</apply>
<apply>
<ln/>
<apply>
<divide/>
<ci>Na_o</ci>
<ci>Na_i</ci>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>E_K</ci>
<apply>
<times/>
<apply>
<divide/>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
<ci>F</ci>
</apply>
<apply>
<ln/>
<apply>
<divide/>
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<ci>K_i</ci>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>E_Ks</ci>
<apply>
<times/>
<apply>
<divide/>
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<times/>
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<ci>T</ci>
</apply>
<ci>F</ci>
</apply>
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<ln/>
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<divide/>
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<plus/>
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<times/>
<ci>P_kna</ci>
<ci>Na_o</ci>
</apply>
</apply>
<apply>
<plus/>
<ci>K_i</ci>
<apply>
<times/>
<ci>P_kna</ci>
<ci>Na_i</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>E_Ca</ci>
<apply>
<times/>
<apply>
<divide/>
<apply>
<times/>
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<ci>R</ci>
<ci>T</ci>
</apply>
<ci>F</ci>
</apply>
<apply>
<ln/>
<apply>
<divide/>
<ci>Ca_o</ci>
<ci>Ca_i</ci>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>E_mh</ci>
<apply>
<times/>
<apply>
<divide/>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
<ci>F</ci>
</apply>
<apply>
<ln/>
<apply>
<divide/>
<apply>
<plus/>
<ci>Na_o</ci>
<apply>
<times/>
<cn cellml:units="dimensionless">0.12</cn>
<ci>K_o</ci>
</apply>
</apply>
<apply>
<plus/>
<ci>Na_i</ci>
<apply>
<times/>
<cn cellml:units="dimensionless">0.12</cn>
<ci>K_i</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00002" name="time_independent_potassium_current">
<variable name="i_K1" public_interface="out" units="nanoA"/>
<variable initial_value="10" name="K_mk1" public_interface="out" units="millimolar"/>
<variable initial_value="0.5" name="g_K1" units="microS"/>
<variable name="K_o" public_interface="in" units="millimolar"/>
<variable name="V" public_interface="in" units="millivolt"/>
<variable name="E_K" public_interface="in" units="millivolt"/>
<variable name="R" public_interface="in" units="joule_per_kilomole_kelvin"/>
<variable name="F" public_interface="in" units="coulomb_per_mole"/>
<variable name="T" public_interface="in" units="kelvin"/>
<variable name="time" public_interface="in" units="second"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
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<apply>
<divide/>
<apply>
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<apply>
<divide/>
<apply>
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<ci>K_o</ci>
</apply>
<apply>
<plus/>
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<ci>K_mk1</ci>
</apply>
</apply>
<apply>
<minus/>
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<ci>E_K</ci>
</apply>
</apply>
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<plus/>
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<exp/>
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<divide/>
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<minus/>
<apply>
<minus/>
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<ci>E_K</ci>
</apply>
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</apply>
<ci>F</ci>
<cn cellml:units="dimensionless">1.25</cn>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00003" name="rapid_delayed_rectifier_potassium_current">
<variable name="i_Kr" public_interface="out" units="nanoA"/>
<variable initial_value="0.0028" name="g_Kr1" units="microS"/>
<variable initial_value="0.0017" name="g_Kr2" units="microS"/>
<variable name="E_K" public_interface="in" units="millivolt"/>
<variable name="time" private_interface="out" public_interface="in" units="second"/>
<variable name="V" private_interface="out" public_interface="in" units="millivolt"/>
<variable name="xr1" private_interface="in" units="dimensionless"/>
<variable name="xr2" private_interface="in" units="dimensionless"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
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<apply>
<times/>
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<apply>
<plus/>
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<ci>xr1</ci>
</apply>
<apply>
<times/>
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<ci>xr2</ci>
</apply>
</apply>
<cn cellml:units="dimensionless">1</cn>
</apply>
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<plus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<exp/>
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<divide/>
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<plus/>
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<cn cellml:units="millivolt">9</cn>
</apply>
<cn cellml:units="millivolt">22.4</cn>
</apply>
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<minus/>
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<ci>E_K</ci>
</apply>
</apply>
</apply>
</math>
</component>
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<variable name="V" public_interface="in" units="millivolt"/>
<variable name="alpha_xr1" units="per_second"/>
<variable name="beta_xr1" units="per_second"/>
<variable name="time" public_interface="in" units="second"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
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<divide/>
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<minus/>
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</apply>
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<cn cellml:units="millivolt">9</cn>
</apply>
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</apply>
</apply>
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<times/>
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<exp/>
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<divide/>
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<minus/>
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<minus/>
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</apply>
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<cn cellml:units="millivolt">15</cn>
</apply>
</apply>
</apply>
</apply>
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<eq/>
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<diff/>
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<ci>time</ci>
</bvar>
<ci>xr1</ci>
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<minus/>
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<times/>
<ci>alpha_xr1</ci>
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<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>xr1</ci>
</apply>
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<times/>
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<ci>xr1</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00005" name="rapid_delayed_rectifier_potassium_current_xr2_gate">
<variable initial_value="2e-7" name="xr2" public_interface="out" units="dimensionless"/>
<variable name="V" public_interface="in" units="millivolt"/>
<variable name="alpha_xr2" units="per_second"/>
<variable name="beta_xr2" units="per_second"/>
<variable name="time" public_interface="in" units="second"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
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<apply>
<divide/>
<cn cellml:units="per_second">50</cn>
<apply>
<plus/>
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<apply>
<exp/>
<apply>
<divide/>
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<minus/>
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</apply>
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<cn cellml:units="millivolt">9</cn>
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<eq/>
<ci>beta_xr2</ci>
<apply>
<times/>
<cn cellml:units="per_second">0.4</cn>
<apply>
<exp/>
<apply>
<minus/>
<apply>
<power/>
<apply>
<divide/>
<apply>
<plus/>
<ci>V</ci>
<cn cellml:units="millivolt">30</cn>
</apply>
<cn cellml:units="millivolt">30</cn>
</apply>
<cn cellml:units="dimensionless">3</cn>
</apply>
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</apply>
</apply>
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<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>xr2</ci>
</apply>
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<minus/>
<apply>
<times/>
<ci>alpha_xr2</ci>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>xr2</ci>
</apply>
</apply>
<apply>
<times/>
<ci>beta_xr2</ci>
<ci>xr2</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00006" name="slow_delayed_rectifier_potassium_current">
<variable name="i_Ks" public_interface="out" units="nanoA"/>
<variable initial_value="0.0016" name="g_Ks" units="microS"/>
<variable name="E_Ks" public_interface="in" units="millivolt"/>
<variable name="time" private_interface="out" public_interface="in" units="second"/>
<variable name="V" private_interface="out" public_interface="in" units="millivolt"/>
<variable name="xs" private_interface="in" units="dimensionless"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
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<eq/>
<ci>i_Ks</ci>
<apply>
<times/>
<ci>g_Ks</ci>
<apply>
<power/>
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</apply>
<apply>
<minus/>
<ci>V</ci>
<ci>E_Ks</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00007" name="slow_delayed_rectifier_potassium_current_xs_gate">
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<variable name="V" public_interface="in" units="millivolt"/>
<variable name="alpha_xs" units="per_second"/>
<variable name="beta_xs" units="per_second"/>
<variable name="time" public_interface="in" units="second"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>alpha_xs</ci>
<apply>
<divide/>
<cn cellml:units="per_second">14</cn>
<apply>
<plus/>
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<apply>
<exp/>
<apply>
<divide/>
<apply>
<minus/>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">40</cn>
</apply>
</apply>
<cn cellml:units="millivolt">9</cn>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>beta_xs</ci>
<apply>
<times/>
<cn cellml:units="per_second">1</cn>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<minus/>
<ci>V</ci>
</apply>
<cn cellml:units="millivolt">45</cn>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>xs</ci>
</apply>
<apply>
<minus/>
<apply>
<times/>
<ci>alpha_xs</ci>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>xs</ci>
</apply>
</apply>
<apply>
<times/>
<ci>beta_xs</ci>
<ci>xs</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00011" name="fast_sodium_current">
<variable name="i_Na" public_interface="out" units="nanoA"/>
<variable initial_value="0.5" name="g_Na" units="microS"/>
<variable name="E_mh" public_interface="in" units="millivolt"/>
<variable name="time" private_interface="out" public_interface="in" units="second"/>
<variable name="V" private_interface="out" public_interface="in" units="millivolt"/>
<variable name="m" private_interface="in" units="dimensionless"/>
<variable name="h" private_interface="in" units="dimensionless"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>i_Na</ci>
<apply>
<times/>
<ci>g_Na</ci>
<apply>
<power/>
<ci>m</ci>
<cn cellml:units="dimensionless">3</cn>
</apply>
<ci>h</ci>
<apply>
<minus/>
<ci>V</ci>
<ci>E_mh</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00012" name="fast_sodium_current_m_gate">
<variable initial_value="0.0016111" name="m" public_interface="out" units="dimensionless"/>
<variable name="alpha_m" units="per_second"/>
<variable name="beta_m" units="per_second"/>
<variable name="V" public_interface="in" units="millivolt"/>
<variable name="time" public_interface="in" units="second"/>
<variable initial_value="1e-5" name="delta_m" units="millivolt"/>
<variable name="E0_m" units="millivolt"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>E0_m</ci>
<apply>
<plus/>
<ci>V</ci>
<cn cellml:units="millivolt">41</cn>
</apply>
</apply>
<apply>
<eq/>
<ci>alpha_m</ci>
<piecewise>
<piece>
<cn cellml:units="per_second">2000</cn>
<apply>
<lt/>
<apply>
<abs/>
<ci>E0_m</ci>
</apply>
<ci>delta_m</ci>
</apply>
</piece>
<otherwise>
<apply>
<divide/>
<apply>
<times/>
<cn cellml:units="per_millivolt_second">200</cn>
<ci>E0_m</ci>
</apply>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<exp/>
<apply>
<times/>
<apply>
<minus/>
<cn cellml:units="per_millivolt">0.1</cn>
</apply>
<ci>E0_m</ci>
</apply>
</apply>
</apply>
</apply>
</otherwise>
</piecewise>
</apply>
<apply>
<eq/>
<ci>beta_m</ci>
<apply>
<times/>
<cn cellml:units="per_second">8000</cn>
<apply>
<exp/>
<apply>
<times/>
<apply>
<minus/>
<cn cellml:units="per_millivolt">0.056</cn>
</apply>
<apply>
<plus/>
<ci>V</ci>
<cn cellml:units="millivolt">66</cn>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>m</ci>
</apply>
<apply>
<minus/>
<apply>
<times/>
<ci>alpha_m</ci>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>m</ci>
</apply>
</apply>
<apply>
<times/>
<ci>beta_m</ci>
<ci>m</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00013" name="fast_sodium_current_h_gate">
<variable initial_value="0.9944559" name="h" public_interface="out" units="dimensionless"/>
<variable name="alpha_h" units="per_second"/>
<variable name="beta_h" units="per_second"/>
<variable initial_value="0" name="shift_h" units="millivolt"/>
<variable name="V" public_interface="in" units="millivolt"/>
<variable name="time" public_interface="in" units="second"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>alpha_h</ci>
<apply>
<times/>
<cn cellml:units="per_second">20</cn>
<apply>
<exp/>
<apply>
<times/>
<apply>
<minus/>
<cn cellml:units="per_millivolt">0.125</cn>
</apply>
<apply>
<minus/>
<apply>
<plus/>
<ci>V</ci>
<cn cellml:units="millivolt">75</cn>
</apply>
<ci>shift_h</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>beta_h</ci>
<apply>
<divide/>
<cn cellml:units="per_second">2000</cn>
<apply>
<plus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<times/>
<cn cellml:units="dimensionless">320</cn>
<apply>
<exp/>
<apply>
<times/>
<apply>
<minus/>
<cn cellml:units="per_millivolt">0.1</cn>
</apply>
<apply>
<minus/>
<apply>
<plus/>
<ci>V</ci>
<cn cellml:units="millivolt">75</cn>
</apply>
<ci>shift_h</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>h</ci>
</apply>
<apply>
<minus/>
<apply>
<times/>
<ci>alpha_h</ci>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>h</ci>
</apply>
</apply>
<apply>
<times/>
<ci>beta_h</ci>
<ci>h</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00014" name="persistent_sodium_current">
<variable name="i_p_Na" public_interface="out" units="nanoA"/>
<variable initial_value="0.0027" name="g_pna" units="microS"/>
<variable name="E_Na" public_interface="in" units="millivolt"/>
<variable name="time" public_interface="in" units="second"/>
<variable name="V" public_interface="in" units="millivolt"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>i_p_Na</ci>
<apply>
<times/>
<apply>
<divide/>
<apply>
<times/>
<ci>g_pna</ci>
<cn cellml:units="dimensionless">1</cn>
</apply>
<apply>
<plus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<minus/>
<apply>
<plus/>
<ci>V</ci>
<cn cellml:units="millivolt">52</cn>
</apply>
</apply>
<cn cellml:units="millivolt">8</cn>
</apply>
</apply>
</apply>
</apply>
<apply>
<minus/>
<ci>V</ci>
<ci>E_Na</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00015" name="sodium_background_current">
<variable name="i_b_Na" public_interface="out" units="nanoA"/>
<variable initial_value="0.0006" name="g_bna" units="microS"/>
<variable name="Na_i" public_interface="in" units="millimolar"/>
<variable name="E_Na" public_interface="in" units="millivolt"/>
<variable name="time" public_interface="in" units="second"/>
<variable name="V" public_interface="in" units="millivolt"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>i_b_Na</ci>
<apply>
<times/>
<ci>g_bna</ci>
<apply>
<minus/>
<ci>V</ci>
<ci>E_Na</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00016" name="L_type_Ca_channel">
<variable name="i_Ca_L_Ca_cyt" public_interface="out" units="nanoA"/>
<variable name="i_Ca_L_K_cyt" public_interface="out" units="nanoA"/>
<variable name="i_Ca_L_Na_cyt" public_interface="out" units="nanoA"/>
<variable name="i_Ca_L_Ca_ds" public_interface="out" units="nanoA"/>
<variable name="i_Ca_L_K_ds" public_interface="out" units="nanoA"/>
<variable name="i_Ca_L_Na_ds" public_interface="out" units="nanoA"/>
<variable name="i_Ca_L" public_interface="out" units="nanoA"/>
<variable initial_value="1" name="P_Ca_L" units="nanoA_per_millimolar"/>
<variable initial_value="0.002" name="P_CaK" units="dimensionless"/>
<variable initial_value="0.01" name="P_CaNa" units="dimensionless"/>
<variable name="Ca_o" public_interface="in" units="millimolar"/>
<variable name="Ca_i" private_interface="out" public_interface="in" units="millimolar"/>
<variable name="Ca_ds" private_interface="out" public_interface="in" units="millimolar"/>
<variable name="K_o" public_interface="in" units="millimolar"/>
<variable name="K_i" public_interface="in" units="millimolar"/>
<variable name="Na_o" public_interface="in" units="millimolar"/>
<variable name="Na_i" public_interface="in" units="millimolar"/>
<variable name="R" public_interface="in" units="joule_per_kilomole_kelvin"/>
<variable name="F" public_interface="in" units="coulomb_per_mole"/>
<variable name="T" public_interface="in" units="kelvin"/>
<variable name="time" private_interface="out" public_interface="in" units="second"/>
<variable name="V" private_interface="out" public_interface="in" units="millivolt"/>
<variable name="d" private_interface="in" units="dimensionless"/>
<variable name="CaChoncyt" private_interface="in" units="dimensionless"/>
<variable name="CaChonds" private_interface="in" units="dimensionless"/>
<variable initial_value="0.01" name="KCaChoff" private_interface="out" units="millimolar"/>
<variable initial_value="0.001" name="Kmdsinact" private_interface="out" units="millimolar"/>
<variable initial_value="0.7" name="FrICa" units="dimensionless"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>i_Ca_L_Ca_cyt</ci>
<apply>
<times/>
<apply>
<divide/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>FrICa</ci>
</apply>
<cn cellml:units="dimensionless">4</cn>
<ci>P_Ca_L</ci>
<ci>d</ci>
<ci>CaChoncyt</ci>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
</apply>
<ci>F</ci>
<cn cellml:units="dimensionless">2</cn>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<minus/>
<apply>
<times/>
<ci>Ca_i</ci>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<cn cellml:units="millivolt">100</cn>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
<apply>
<times/>
<ci>Ca_o</ci>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
</apply>
<ci>F</ci>
<cn cellml:units="dimensionless">2</cn>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>i_Ca_L_K_cyt</ci>
<apply>
<times/>
<apply>
<divide/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>FrICa</ci>
</apply>
<ci>P_CaK</ci>
<ci>P_Ca_L</ci>
<ci>d</ci>
<ci>CaChoncyt</ci>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
</apply>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<minus/>
<apply>
<times/>
<ci>K_i</ci>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<cn cellml:units="millivolt">50</cn>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
<apply>
<times/>
<ci>K_o</ci>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
</apply>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>i_Ca_L_Na_cyt</ci>
<apply>
<times/>
<apply>
<divide/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>FrICa</ci>
</apply>
<ci>P_CaNa</ci>
<ci>P_Ca_L</ci>
<ci>d</ci>
<ci>CaChoncyt</ci>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
</apply>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<minus/>
<apply>
<times/>
<ci>Na_i</ci>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<cn cellml:units="millivolt">50</cn>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
<apply>
<times/>
<ci>Na_o</ci>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
</apply>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>i_Ca_L_Ca_ds</ci>
<apply>
<times/>
<apply>
<divide/>
<apply>
<divide/>
<apply>
<times/>
<ci>FrICa</ci>
<cn cellml:units="dimensionless">4</cn>
<ci>P_Ca_L</ci>
<ci>d</ci>
<ci>CaChonds</ci>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
</apply>
<ci>F</ci>
<cn cellml:units="dimensionless">2</cn>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<minus/>
<apply>
<times/>
<ci>Ca_i</ci>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<cn cellml:units="millivolt">100</cn>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
<apply>
<times/>
<ci>Ca_o</ci>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
</apply>
<ci>F</ci>
<cn cellml:units="dimensionless">2</cn>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>i_Ca_L_K_ds</ci>
<apply>
<times/>
<apply>
<divide/>
<apply>
<divide/>
<apply>
<times/>
<ci>FrICa</ci>
<ci>P_CaK</ci>
<ci>P_Ca_L</ci>
<ci>d</ci>
<ci>CaChonds</ci>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
</apply>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<minus/>
<apply>
<times/>
<ci>K_i</ci>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<cn cellml:units="millivolt">50</cn>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
<apply>
<times/>
<ci>K_o</ci>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
</apply>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>i_Ca_L_Na_ds</ci>
<apply>
<times/>
<apply>
<divide/>
<apply>
<divide/>
<apply>
<times/>
<ci>FrICa</ci>
<ci>P_CaNa</ci>
<ci>P_Ca_L</ci>
<ci>d</ci>
<ci>CaChonds</ci>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
</apply>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<minus/>
<apply>
<times/>
<ci>Na_i</ci>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<cn cellml:units="millivolt">50</cn>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
<apply>
<times/>
<ci>Na_o</ci>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">50</cn>
</apply>
</apply>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>i_Ca_L</ci>
<apply>
<plus/>
<ci>i_Ca_L_Ca_cyt</ci>
<ci>i_Ca_L_K_cyt</ci>
<ci>i_Ca_L_Na_cyt</ci>
<ci>i_Ca_L_Ca_ds</ci>
<ci>i_Ca_L_K_ds</ci>
<ci>i_Ca_L_Na_ds</ci>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00017" name="L_type_Ca_channel_d_gate">
<variable initial_value="0" name="d" public_interface="out" units="dimensionless"/>
<variable name="alpha_d" units="per_second"/>
<variable name="beta_d" units="per_second"/>
<variable name="V" public_interface="in" units="millivolt"/>
<variable name="time" public_interface="in" units="second"/>
<variable name="E0_d" units="millivolt"/>
<variable initial_value="3" name="speed_d" units="dimensionless"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>E0_d</ci>
<apply>
<minus/>
<apply>
<plus/>
<ci>V</ci>
<cn cellml:units="millivolt">24</cn>
</apply>
<cn cellml:units="millivolt">5</cn>
</apply>
</apply>
<apply>
<eq/>
<ci>alpha_d</ci>
<piecewise>
<piece>
<cn cellml:units="per_second">120</cn>
<apply>
<lt/>
<apply>
<abs/>
<ci>E0_d</ci>
</apply>
<cn cellml:units="millivolt">0.0001</cn>
</apply>
</piece>
<otherwise>
<apply>
<divide/>
<apply>
<times/>
<cn cellml:units="per_millivolt_second">30</cn>
<ci>E0_d</ci>
</apply>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<minus/>
<ci>E0_d</ci>
</apply>
<cn cellml:units="millivolt">4</cn>
</apply>
</apply>
</apply>
</apply>
</otherwise>
</piecewise>
</apply>
<apply>
<eq/>
<ci>beta_d</ci>
<piecewise>
<piece>
<cn cellml:units="per_second">120</cn>
<apply>
<lt/>
<apply>
<abs/>
<ci>E0_d</ci>
</apply>
<cn cellml:units="millivolt">0.0001</cn>
</apply>
</piece>
<otherwise>
<apply>
<divide/>
<apply>
<times/>
<cn cellml:units="per_millivolt_second">12</cn>
<ci>E0_d</ci>
</apply>
<apply>
<minus/>
<apply>
<exp/>
<apply>
<divide/>
<ci>E0_d</ci>
<cn cellml:units="millivolt">10</cn>
</apply>
</apply>
<cn cellml:units="dimensionless">1</cn>
</apply>
</apply>
</otherwise>
</piecewise>
</apply>
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>d</ci>
</apply>
<apply>
<times/>
<ci>speed_d</ci>
<apply>
<minus/>
<apply>
<times/>
<ci>alpha_d</ci>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>d</ci>
</apply>
</apply>
<apply>
<times/>
<ci>beta_d</ci>
<ci>d</ci>
</apply>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00018" name="L_type_Ca_channel_f_gate">
<variable initial_value="0" name="f" units="dimensionless"/>
<variable name="CaChoncyt" public_interface="out" units="dimensionless"/>
<variable name="CaChonds" public_interface="out" units="dimensionless"/>
<variable name="CaChoffcyt" units="dimensionless"/>
<variable name="CaChoffds" units="dimensionless"/>
<variable name="alpha_f" units="per_second"/>
<variable name="beta_f" units="per_second"/>
<variable name="V" public_interface="in" units="millivolt"/>
<variable name="Ca_i" public_interface="in" units="millimolar"/>
<variable name="Ca_ds" public_interface="in" units="millimolar"/>
<variable name="KCaChoff" public_interface="in" units="millimolar"/>
<variable name="Kmdsinact" public_interface="in" units="millimolar"/>
<variable name="time" public_interface="in" units="second"/>
<variable initial_value="0.3" name="speed_f" units="dimensionless"/>
<variable initial_value="0.0001" name="delta_f" units="millivolt"/>
<variable name="E0_f" units="millivolt"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>E0_f</ci>
<apply>
<plus/>
<ci>V</ci>
<cn cellml:units="millivolt">34</cn>
</apply>
</apply>
<apply>
<eq/>
<ci>alpha_f</ci>
<piecewise>
<piece>
<cn cellml:units="per_second">25</cn>
<apply>
<lt/>
<apply>
<abs/>
<ci>E0_f</ci>
</apply>
<ci>delta_f</ci>
</apply>
</piece>
<otherwise>
<apply>
<divide/>
<apply>
<times/>
<cn cellml:units="per_millivolt_second">6.25</cn>
<ci>E0_f</ci>
</apply>
<apply>
<minus/>
<apply>
<exp/>
<apply>
<divide/>
<ci>E0_f</ci>
<cn cellml:units="millivolt">4</cn>
</apply>
</apply>
<cn cellml:units="dimensionless">1</cn>
</apply>
</apply>
</otherwise>
</piecewise>
</apply>
<apply>
<eq/>
<ci>beta_f</ci>
<apply>
<divide/>
<cn cellml:units="per_second">12</cn>
<apply>
<plus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
</apply>
<apply>
<plus/>
<ci>V</ci>
<cn cellml:units="millivolt">34</cn>
</apply>
</apply>
<cn cellml:units="millivolt">4</cn>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>CaChoffcyt</ci>
<apply>
<divide/>
<ci>Ca_i</ci>
<apply>
<plus/>
<ci>KCaChoff</ci>
<ci>Ca_i</ci>
</apply>
</apply>
</apply>
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>f</ci>
</apply>
<apply>
<minus/>
<apply>
<times/>
<apply>
<plus/>
<apply>
<times/>
<cn cellml:units="dimensionless">120</cn>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>f</ci>
</apply>
<ci>CaChoffcyt</ci>
</apply>
<apply>
<times/>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>f</ci>
</apply>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>CaChoffcyt</ci>
</apply>
</apply>
</apply>
<ci>speed_f</ci>
<ci>beta_f</ci>
</apply>
<apply>
<times/>
<ci>alpha_f</ci>
<ci>f</ci>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>CaChoncyt</ci>
<apply>
<times/>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>f</ci>
</apply>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>CaChoffcyt</ci>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>CaChoffds</ci>
<apply>
<divide/>
<ci>Ca_ds</ci>
<apply>
<plus/>
<ci>Kmdsinact</ci>
<ci>Ca_ds</ci>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>CaChonds</ci>
<apply>
<times/>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>f</ci>
</apply>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>CaChoffds</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00022" name="calcium_background_current">
<variable name="i_b_Ca" public_interface="out" units="nanoA"/>
<variable initial_value="0.00025" name="g_bca" units="microS"/>
<variable name="E_Ca" public_interface="in" units="millivolt"/>
<variable name="time" public_interface="in" units="second"/>
<variable name="V" public_interface="in" units="millivolt"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>i_b_Ca</ci>
<apply>
<times/>
<ci>g_bca</ci>
<apply>
<minus/>
<ci>V</ci>
<ci>E_Ca</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00008" name="transient_outward_current">
<variable name="i_to" public_interface="out" units="nanoA"/>
<variable initial_value="0.005" name="g_to" units="microS"/>
<variable initial_value="0" name="g_tos" units="dimensionless"/>
<variable name="E_K" public_interface="in" units="millivolt"/>
<variable name="V" private_interface="out" public_interface="in" units="millivolt"/>
<variable name="time" private_interface="out" public_interface="in" units="second"/>
<variable name="s" private_interface="in" units="dimensionless"/>
<variable name="r" private_interface="in" units="dimensionless"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>i_to</ci>
<apply>
<times/>
<ci>g_to</ci>
<apply>
<plus/>
<ci>g_tos</ci>
<apply>
<times/>
<ci>s</ci>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>g_tos</ci>
</apply>
</apply>
</apply>
<ci>r</ci>
<apply>
<minus/>
<ci>V</ci>
<ci>E_K</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00009" name="transient_outward_current_s_gate">
<variable initial_value="0.9948645" name="s" public_interface="out" units="dimensionless"/>
<variable name="alpha_s" units="per_second"/>
<variable name="beta_s" units="per_second"/>
<variable name="V" public_interface="in" units="millivolt"/>
<variable name="time" public_interface="in" units="second"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>alpha_s</ci>
<apply>
<times/>
<cn cellml:units="per_second">0.033</cn>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<minus/>
<ci>V</ci>
</apply>
<cn cellml:units="millivolt">17</cn>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>beta_s</ci>
<apply>
<divide/>
<cn cellml:units="per_second">33</cn>
<apply>
<plus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<exp/>
<apply>
<times/>
<apply>
<minus/>
<cn cellml:units="per_millivolt">0.125</cn>
</apply>
<apply>
<plus/>
<ci>V</ci>
<cn cellml:units="millivolt">10</cn>
</apply>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>s</ci>
</apply>
<apply>
<minus/>
<apply>
<times/>
<ci>alpha_s</ci>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>s</ci>
</apply>
</apply>
<apply>
<times/>
<ci>beta_s</ci>
<ci>s</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00010" name="transient_outward_current_r_gate">
<variable initial_value="0" name="r" public_interface="out" units="dimensionless"/>
<variable name="V" public_interface="in" units="millivolt"/>
<variable name="time" public_interface="in" units="second"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>r</ci>
</apply>
<apply>
<times/>
<cn cellml:units="per_second">333</cn>
<apply>
<minus/>
<apply>
<divide/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<plus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<minus/>
<apply>
<plus/>
<ci>V</ci>
<cn cellml:units="millivolt">4</cn>
</apply>
</apply>
<cn cellml:units="millivolt">5</cn>
</apply>
</apply>
</apply>
</apply>
<ci>r</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00020" name="sodium_potassium_pump">
<variable name="i_NaK" public_interface="out" units="nanoA"/>
<variable initial_value="0.7" name="i_NaK_max" units="nanoA"/>
<variable initial_value="1" name="K_mK" units="millimolar"/>
<variable initial_value="40" name="K_mNa" units="millimolar"/>
<variable name="K_o" public_interface="in" units="millimolar"/>
<variable name="Na_i" public_interface="in" units="millimolar"/>
<variable name="time" public_interface="in" units="second"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>i_NaK</ci>
<apply>
<divide/>
<apply>
<times/>
<apply>
<divide/>
<apply>
<times/>
<ci>i_NaK_max</ci>
<ci>K_o</ci>
</apply>
<apply>
<plus/>
<ci>K_mK</ci>
<ci>K_o</ci>
</apply>
</apply>
<ci>Na_i</ci>
</apply>
<apply>
<plus/>
<ci>K_mNa</ci>
<ci>Na_i</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00021" name="sodium_calcium_exchanger">
<variable name="i_NaCa" public_interface="out" units="nanoA"/>
<variable name="i_NaCa_cyt" public_interface="out" units="nanoA"/>
<variable name="i_NaCa_ds" public_interface="out" units="nanoA"/>
<variable initial_value="0.0005" name="k_NaCa" units="nanoA"/>
<variable initial_value="3" name="n_NaCa" units="dimensionless"/>
<variable initial_value="0" name="d_NaCa" units="dimensionless"/>
<variable initial_value="0.2" name="gamma" units="dimensionless"/>
<variable initial_value="0.001" name="FRiNaCa" units="dimensionless"/>
<variable name="Na_i" public_interface="in" units="millimolar"/>
<variable name="Na_o" public_interface="in" units="millimolar"/>
<variable name="Ca_i" public_interface="in" units="millimolar"/>
<variable name="Ca_ds" public_interface="in" units="millimolar"/>
<variable name="Ca_o" public_interface="in" units="millimolar"/>
<variable name="R" public_interface="in" units="joule_per_kilomole_kelvin"/>
<variable name="F" public_interface="in" units="coulomb_per_mole"/>
<variable name="T" public_interface="in" units="kelvin"/>
<variable name="V" public_interface="in" units="millivolt"/>
<variable name="time" public_interface="in" units="second"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>i_NaCa_cyt</ci>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>FRiNaCa</ci>
</apply>
<ci>k_NaCa</ci>
<apply>
<minus/>
<apply>
<times/>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<ci>gamma</ci>
<apply>
<minus/>
<ci>n_NaCa</ci>
<cn cellml:units="dimensionless">2</cn>
</apply>
<ci>V</ci>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
<apply>
<power/>
<ci>Na_i</ci>
<ci>n_NaCa</ci>
</apply>
<ci>Ca_o</ci>
</apply>
<apply>
<times/>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<ci>gamma</ci>
<cn cellml:units="dimensionless">1</cn>
</apply>
<apply>
<minus/>
<ci>n_NaCa</ci>
<cn cellml:units="dimensionless">2</cn>
</apply>
<ci>V</ci>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
<apply>
<power/>
<ci>Na_o</ci>
<ci>n_NaCa</ci>
</apply>
<ci>Ca_i</ci>
</apply>
</apply>
</apply>
<apply>
<times/>
<apply>
<plus/>
<cn cellml:units="millimolar4">1</cn>
<apply>
<times/>
<ci>d_NaCa</ci>
<apply>
<plus/>
<apply>
<times/>
<ci>Ca_i</ci>
<apply>
<power/>
<ci>Na_o</ci>
<ci>n_NaCa</ci>
</apply>
</apply>
<apply>
<times/>
<ci>Ca_o</ci>
<apply>
<power/>
<ci>Na_i</ci>
<ci>n_NaCa</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<plus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<divide/>
<ci>Ca_i</ci>
<cn cellml:units="millimolar">0.0069</cn>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>i_NaCa_ds</ci>
<apply>
<divide/>
<apply>
<times/>
<ci>FRiNaCa</ci>
<ci>k_NaCa</ci>
<apply>
<minus/>
<apply>
<times/>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<ci>gamma</ci>
<apply>
<minus/>
<ci>n_NaCa</ci>
<cn cellml:units="dimensionless">2</cn>
</apply>
<ci>V</ci>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
<apply>
<power/>
<ci>Na_i</ci>
<ci>n_NaCa</ci>
</apply>
<ci>Ca_o</ci>
</apply>
<apply>
<times/>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<ci>gamma</ci>
<cn cellml:units="dimensionless">1</cn>
</apply>
<apply>
<minus/>
<ci>n_NaCa</ci>
<cn cellml:units="dimensionless">2</cn>
</apply>
<ci>V</ci>
<ci>F</ci>
</apply>
<apply>
<times/>
<ci>R</ci>
<ci>T</ci>
</apply>
</apply>
</apply>
<apply>
<power/>
<ci>Na_o</ci>
<ci>n_NaCa</ci>
</apply>
<ci>Ca_ds</ci>
</apply>
</apply>
</apply>
<apply>
<times/>
<apply>
<plus/>
<cn cellml:units="millimolar4">1</cn>
<apply>
<times/>
<ci>d_NaCa</ci>
<apply>
<plus/>
<apply>
<times/>
<ci>Ca_ds</ci>
<apply>
<power/>
<ci>Na_o</ci>
<ci>n_NaCa</ci>
</apply>
</apply>
<apply>
<times/>
<ci>Ca_o</ci>
<apply>
<power/>
<ci>Na_i</ci>
<ci>n_NaCa</ci>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<plus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<divide/>
<ci>Ca_ds</ci>
<cn cellml:units="millimolar">0.0069</cn>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>i_NaCa</ci>
<apply>
<plus/>
<ci>i_NaCa_cyt</ci>
<ci>i_NaCa_ds</ci>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00023" name="sarcoplasmic_reticulum_calcium_pump">
<variable name="i_up" public_interface="out" units="millimolar_per_second"/>
<variable name="K_1" units="dimensionless"/>
<variable name="K_2" units="millimolar"/>
<variable initial_value="0.0003" name="K_cyca" units="millimolar"/>
<variable initial_value="0.4" name="K_xcs" units="dimensionless"/>
<variable initial_value="0.5" name="K_srca" units="millimolar"/>
<variable initial_value="0.4" name="alpha_up" units="millimolar_per_second"/>
<variable initial_value="0.03" name="beta_up" units="millimolar_per_second"/>
<variable name="Ca_i" public_interface="in" units="millimolar"/>
<variable name="Ca_up" public_interface="in" units="millimolar"/>
<variable name="time" public_interface="in" units="second"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>K_1</ci>
<apply>
<divide/>
<apply>
<times/>
<ci>K_cyca</ci>
<ci>K_xcs</ci>
</apply>
<ci>K_srca</ci>
</apply>
</apply>
<apply>
<eq/>
<ci>K_2</ci>
<apply>
<plus/>
<ci>Ca_i</ci>
<apply>
<times/>
<ci>Ca_up</ci>
<ci>K_1</ci>
</apply>
<apply>
<times/>
<ci>K_cyca</ci>
<ci>K_xcs</ci>
</apply>
<ci>K_cyca</ci>
</apply>
</apply>
<apply>
<eq/>
<ci>i_up</ci>
<apply>
<minus/>
<apply>
<times/>
<apply>
<divide/>
<ci>Ca_i</ci>
<ci>K_2</ci>
</apply>
<ci>alpha_up</ci>
</apply>
<apply>
<times/>
<apply>
<divide/>
<apply>
<times/>
<ci>Ca_up</ci>
<ci>K_1</ci>
</apply>
<ci>K_2</ci>
</apply>
<ci>beta_up</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00024" name="calcium_translocation">
<variable name="i_trans" public_interface="out" units="millimolar_per_second"/>
<variable name="Ca_rel" public_interface="in" units="millimolar"/>
<variable name="Ca_up" public_interface="in" units="millimolar"/>
<variable name="time" public_interface="in" units="second"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>i_trans</ci>
<apply>
<times/>
<cn cellml:units="per_second">50</cn>
<apply>
<minus/>
<ci>Ca_up</ci>
<ci>Ca_rel</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component cmeta:id="id_00025" name="calcium_release">
<variable name="i_rel" public_interface="out" units="millimolar_per_second"/>
<variable name="VoltDep" units="dimensionless"/>
<variable name="RegBindSite" units="dimensionless"/>
<variable name="CaiReg" units="dimensionless"/>
<variable name="CadsReg" units="dimensionless"/>
<variable name="ActRate" units="per_second"/>
<variable name="InactRate" units="per_second"/>
<variable initial_value="0.05" name="K_leak_rate" units="per_second"/>
<variable initial_value="250" name="K_m_rel" units="per_second"/>
<variable initial_value="0.0005" name="K_m_Ca_cyt" units="millimolar"/>
<variable initial_value="0.01" name="K_m_Ca_ds" units="millimolar"/>
<variable name="PrecFrac" units="dimensionless"/>
<variable initial_value="0.0049039" name="ActFrac" units="dimensionless"/>
<variable initial_value="0.6950649" name="ProdFrac" units="dimensionless"/>
<variable name="SpeedRel" units="dimensionless"/>
<variable name="time" public_interface="in" units="second"/>
<variable name="V" public_interface="in" units="millivolt"/>
<variable name="Ca_i" public_interface="in" units="millimolar"/>
<variable name="Ca_ds" public_interface="in" units="millimolar"/>
<variable name="Ca_rel" public_interface="in" units="millimolar"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>VoltDep</ci>
<apply>
<exp/>
<apply>
<times/>
<cn cellml:units="per_millivolt">0.08</cn>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">40</cn>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>CaiReg</ci>
<apply>
<divide/>
<ci>Ca_i</ci>
<apply>
<plus/>
<ci>Ca_i</ci>
<ci>K_m_Ca_cyt</ci>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>CadsReg</ci>
<apply>
<divide/>
<ci>Ca_ds</ci>
<apply>
<plus/>
<ci>Ca_ds</ci>
<ci>K_m_Ca_ds</ci>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>RegBindSite</ci>
<apply>
<plus/>
<ci>CaiReg</ci>
<apply>
<times/>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>CaiReg</ci>
</apply>
<ci>CadsReg</ci>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>ActRate</ci>
<apply>
<plus/>
<apply>
<times/>
<cn cellml:units="per_second">0</cn>
<ci>VoltDep</ci>
</apply>
<apply>
<times/>
<cn cellml:units="per_second">90</cn>
<apply>
<power/>
<ci>RegBindSite</ci>
<cn cellml:units="dimensionless">2</cn>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>InactRate</ci>
<apply>
<plus/>
<cn cellml:units="per_second">60</cn>
<apply>
<times/>
<cn cellml:units="per_second">500</cn>
<apply>
<power/>
<ci>RegBindSite</ci>
<cn cellml:units="dimensionless">2</cn>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>SpeedRel</ci>
<piecewise>
<piece>
<cn cellml:units="dimensionless">5</cn>
<apply>
<lt/>
<ci>V</ci>
<apply>
<minus/>
<cn cellml:units="millivolt">50</cn>
</apply>
</apply>
</piece>
<otherwise>
<cn cellml:units="dimensionless">1</cn>
</otherwise>
</piecewise>
</apply>
<apply>
<eq/>
<ci>PrecFrac</ci>
<apply>
<minus/>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>ActFrac</ci>
</apply>
<ci>ProdFrac</ci>
</apply>
</apply>
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>ActFrac</ci>
</apply>
<apply>
<minus/>
<apply>
<times/>
<ci>PrecFrac</ci>
<ci>SpeedRel</ci>
<ci>ActRate</ci>
</apply>
<apply>
<times/>
<ci>ActFrac</ci>
<ci>SpeedRel</ci>
<ci>InactRate</ci>
</apply>
</apply>
</apply>
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>ProdFrac</ci>
</apply>
<apply>
<minus/>
<apply>
<times/>
<ci>ActFrac</ci>
<ci>SpeedRel</ci>
<ci>InactRate</ci>
</apply>
<apply>
<times/>
<ci>SpeedRel</ci>
<cn cellml:units="per_second">1</cn>
<ci>ProdFrac</ci>
</apply>
</apply>
</apply>
<apply>
<eq/>
<ci>i_rel</ci>
<apply>
<times/>
<apply>
<plus/>
<apply>
<times/>
<apply>
<power/>
<apply>
<divide/>
<ci>ActFrac</ci>
<apply>
<plus/>
<ci>ActFrac</ci>
<cn cellml:units="dimensionless">0.25</cn>
</apply>
</apply>
<cn cellml:units="dimensionless">2</cn>
</apply>
<ci>K_m_rel</ci>
</apply>
<ci>K_leak_rate</ci>
</apply>
<ci>Ca_rel</ci>
</apply>
</apply>
</math>
</component>
<component name="extracellular_sodium_concentration">
<variable initial_value="140" name="Na_o" public_interface="out" units="millimolar"/>
</component>
<component name="intracellular_sodium_concentration">
<variable initial_value="7.6713487" name="Na_i" public_interface="out" units="millimolar"/>
<variable name="V_i" public_interface="in" units="micrometre3"/>
<variable name="time" public_interface="in" units="second"/>
<variable name="F" public_interface="in" units="coulomb_per_mole"/>
<variable name="i_Na" public_interface="in" units="nanoA"/>
<variable name="i_b_Na" public_interface="in" units="nanoA"/>
<variable name="i_p_Na" public_interface="in" units="nanoA"/>
<variable name="i_Ca_L_Na_cyt" public_interface="in" units="nanoA"/>
<variable name="i_Ca_L_Na_ds" public_interface="in" units="nanoA"/>
<variable name="i_NaK" public_interface="in" units="nanoA"/>
<variable name="i_NaCa_cyt" public_interface="in" units="nanoA"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>Na_i</ci>
</apply>
<apply>
<times/>
<apply>
<divide/>
<apply>
<minus/>
<cn cellml:units="mA_nA">1</cn>
</apply>
<apply>
<times/>
<cn cellml:units="litre_micrometre3">1</cn>
<ci>V_i</ci>
<ci>F</ci>
</apply>
</apply>
<apply>
<plus/>
<ci>i_Na</ci>
<ci>i_p_Na</ci>
<ci>i_b_Na</ci>
<apply>
<times/>
<cn cellml:units="dimensionless">3</cn>
<ci>i_NaK</ci>
</apply>
<apply>
<times/>
<cn cellml:units="dimensionless">3</cn>
<ci>i_NaCa_cyt</ci>
</apply>
<ci>i_Ca_L_Na_cyt</ci>
<ci>i_Ca_L_Na_ds</ci>
</apply>
</apply>
</apply>
</math>
</component>
<component name="extracellular_calcium_concentration">
<variable initial_value="2" name="Ca_o" public_interface="out" units="millimolar"/>
</component>
<component name="extracellular_potassium_concentration">
<variable initial_value="4" name="K_o" public_interface="out" units="millimolar"/>
</component>
<component name="intracellular_potassium_concentration">
<variable initial_value="136.1745362" name="K_i" public_interface="out" units="millimolar"/>
<variable name="V_i" public_interface="in" units="micrometre3"/>
<variable name="i_K1" public_interface="in" units="nanoA"/>
<variable name="i_Kr" public_interface="in" units="nanoA"/>
<variable name="i_Ks" public_interface="in" units="nanoA"/>
<variable name="i_Ca_L_K_cyt" public_interface="in" units="nanoA"/>
<variable name="i_Ca_L_K_ds" public_interface="in" units="nanoA"/>
<variable name="i_to" public_interface="in" units="nanoA"/>
<variable name="i_NaK" public_interface="in" units="nanoA"/>
<variable name="time" public_interface="in" units="second"/>
<variable name="F" public_interface="in" units="coulomb_per_mole"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>K_i</ci>
</apply>
<apply>
<times/>
<apply>
<divide/>
<apply>
<minus/>
<cn cellml:units="mA_nA">1</cn>
</apply>
<apply>
<times/>
<cn cellml:units="litre_micrometre3">1</cn>
<ci>V_i</ci>
<ci>F</ci>
</apply>
</apply>
<apply>
<minus/>
<apply>
<plus/>
<ci>i_K1</ci>
<ci>i_Kr</ci>
<ci>i_Ks</ci>
<ci>i_Ca_L_K_cyt</ci>
<ci>i_Ca_L_K_ds</ci>
<ci>i_to</ci>
</apply>
<apply>
<times/>
<cn cellml:units="dimensionless">2</cn>
<ci>i_NaK</ci>
</apply>
</apply>
</apply>
</apply>
</math>
</component>
<component name="intracellular_calcium_concentration">
<variable initial_value="1.49e-5" name="Ca_i" public_interface="out" units="millimolar"/>
<variable initial_value="2.7e-6" name="Ca_ds" public_interface="out" units="millimolar"/>
<variable initial_value="0.36963" name="Ca_up" public_interface="out" units="millimolar"/>
<variable initial_value="0.6460487" name="Ca_rel" public_interface="out" units="millimolar"/>
<variable initial_value="0.0005841" name="Ca_Calmod" units="millimolar"/>
<variable initial_value="0.0003732" name="Ca_Trop" units="millimolar"/>
<variable initial_value="0.02" name="Calmod" units="millimolar"/>
<variable initial_value="0.05" name="Trop" units="millimolar"/>
<variable initial_value="100000" name="alpha_Calmod" units="per_millimolar_second"/>
<variable initial_value="50" name="beta_Calmod" units="per_second"/>
<variable initial_value="100000" name="alpha_Trop" units="per_millimolar_second"/>
<variable initial_value="200" name="beta_Trop" units="per_second"/>
<variable initial_value="12" name="radius" units="micrometre"/>
<variable initial_value="74" name="length" units="micrometre"/>
<variable name="V_i" public_interface="out" units="micrometre3"/>
<variable name="V_Cell" units="micrometre3"/>
<variable name="V_i_ratio" units="dimensionless"/>
<variable initial_value="0.1" name="V_ds_ratio" units="dimensionless"/>
<variable initial_value="0.1" name="V_rel_ratio" units="dimensionless"/>
<variable initial_value="0.4" name="V_e_ratio" units="dimensionless"/>
<variable initial_value="0.01" name="V_up_ratio" units="dimensionless"/>
<variable initial_value="10" name="Kdecay" units="per_second"/>
<variable name="i_up" public_interface="in" units="millimolar_per_second"/>
<variable name="i_trans" public_interface="in" units="millimolar_per_second"/>
<variable name="i_rel" public_interface="in" units="millimolar_per_second"/>
<variable name="i_NaCa_cyt" public_interface="in" units="nanoA"/>
<variable name="i_NaCa_ds" public_interface="in" units="nanoA"/>
<variable name="i_Ca_L_Ca_cyt" public_interface="in" units="nanoA"/>
<variable name="i_Ca_L_Ca_ds" public_interface="in" units="nanoA"/>
<variable name="i_b_Ca" public_interface="in" units="nanoA"/>
<variable name="F" public_interface="in" units="coulomb_per_mole"/>
<variable name="time" public_interface="in" units="second"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>V_Cell</ci>
<apply>
<divide/>
<apply>
<times/>
<cn cellml:units="dimensionless">3.141592654</cn>
<apply>
<power/>
<apply>
<divide/>
<ci>radius</ci>
<cn cellml:units="dimensionless">1000</cn>
</apply>
<cn cellml:units="dimensionless">2</cn>
</apply>
<ci>length</ci>
</apply>
<cn cellml:units="dimensionless">1000</cn>
</apply>
</apply>
<apply>
<eq/>
<ci>V_i_ratio</ci>
<apply>
<minus/>
<apply>
<minus/>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>V_e_ratio</ci>
</apply>
<ci>V_up_ratio</ci>
</apply>
<ci>V_rel_ratio</ci>
</apply>
</apply>
<apply>
<eq/>
<ci>V_i</ci>
<apply>
<times/>
<ci>V_Cell</ci>
<ci>V_i_ratio</ci>
</apply>
</apply>
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>Ca_i</ci>
</apply>
<apply>
<minus/>
<apply>
<minus/>
<apply>
<minus/>
<apply>
<plus/>
<apply>
<times/>
<apply>
<divide/>
<apply>
<minus/>
<cn cellml:units="mA_nA">1</cn>
</apply>
<apply>
<times/>
<cn cellml:units="dimensionless">2</cn>
<cn cellml:units="litre_micrometre3">1</cn>
<ci>V_i</ci>
<ci>F</ci>
</apply>
</apply>
<apply>
<minus/>
<apply>
<minus/>
<apply>
<plus/>
<ci>i_Ca_L_Ca_cyt</ci>
<ci>i_b_Ca</ci>
</apply>
<apply>
<times/>
<cn cellml:units="dimensionless">2</cn>
<ci>i_NaCa_cyt</ci>
</apply>
</apply>
<apply>
<times/>
<cn cellml:units="dimensionless">2</cn>
<ci>i_NaCa_ds</ci>
</apply>
</apply>
</apply>
<apply>
<times/>
<ci>Ca_ds</ci>
<ci>V_ds_ratio</ci>
<ci>Kdecay</ci>
</apply>
<apply>
<divide/>
<apply>
<times/>
<ci>i_rel</ci>
<ci>V_rel_ratio</ci>
</apply>
<ci>V_i_ratio</ci>
</apply>
</apply>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>Ca_Calmod</ci>
</apply>
</apply>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>Ca_Trop</ci>
</apply>
</apply>
<ci>i_up</ci>
</apply>
</apply>
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>Ca_ds</ci>
</apply>
<apply>
<minus/>
<apply>
<divide/>
<apply>
<times/>
<apply>
<minus/>
<cn cellml:units="mA_nA">1</cn>
</apply>
<ci>i_Ca_L_Ca_ds</ci>
</apply>
<apply>
<times/>
<cn cellml:units="dimensionless">2</cn>
<cn cellml:units="litre_micrometre3">1</cn>
<ci>V_ds_ratio</ci>
<ci>V_i</ci>
<ci>F</ci>
</apply>
</apply>
<apply>
<times/>
<ci>Ca_ds</ci>
<ci>Kdecay</ci>
</apply>
</apply>
</apply>
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>Ca_up</ci>
</apply>
<apply>
<minus/>
<apply>
<times/>
<apply>
<divide/>
<ci>V_i_ratio</ci>
<ci>V_up_ratio</ci>
</apply>
<ci>i_up</ci>
</apply>
<ci>i_trans</ci>
</apply>
</apply>
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>Ca_rel</ci>
</apply>
<apply>
<minus/>
<apply>
<times/>
<apply>
<divide/>
<ci>V_up_ratio</ci>
<ci>V_rel_ratio</ci>
</apply>
<ci>i_trans</ci>
</apply>
<ci>i_rel</ci>
</apply>
</apply>
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>Ca_Calmod</ci>
</apply>
<apply>
<minus/>
<apply>
<times/>
<ci>alpha_Calmod</ci>
<ci>Ca_i</ci>
<apply>
<minus/>
<ci>Calmod</ci>
<ci>Ca_Calmod</ci>
</apply>
</apply>
<apply>
<times/>
<ci>beta_Calmod</ci>
<ci>Ca_Calmod</ci>
</apply>
</apply>
</apply>
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>Ca_Trop</ci>
</apply>
<apply>
<minus/>
<apply>
<times/>
<ci>alpha_Trop</ci>
<ci>Ca_i</ci>
<apply>
<minus/>
<ci>Trop</ci>
<ci>Ca_Trop</ci>
</apply>
</apply>
<apply>
<times/>
<ci>beta_Trop</ci>
<ci>Ca_Trop</ci>
</apply>
</apply>
</apply>
</math>
</component>
<group>
<relationship_ref relationship="encapsulation"/>
<component_ref cmeta:id="id_00026" component="fast_sodium_current">
<component_ref cmeta:id="id_00027" component="fast_sodium_current_m_gate"/>
<component_ref cmeta:id="id_00028" component="fast_sodium_current_h_gate"/>
</component_ref>
<component_ref cmeta:id="id_00029" component="L_type_Ca_channel">
<component_ref cmeta:id="id_00030" component="L_type_Ca_channel_d_gate"/>
<component_ref cmeta:id="id_00031" component="L_type_Ca_channel_f_gate"/>
</component_ref>
<component_ref cmeta:id="id_00032" component="transient_outward_current">
<component_ref cmeta:id="id_00033" component="transient_outward_current_s_gate"/>
<component_ref cmeta:id="id_00034" component="transient_outward_current_r_gate"/>
</component_ref>
<component_ref cmeta:id="id_00035" component="rapid_delayed_rectifier_potassium_current">
<component_ref cmeta:id="id_00036" component="rapid_delayed_rectifier_potassium_current_xr1_gate"/>
<component_ref cmeta:id="id_00037" component="rapid_delayed_rectifier_potassium_current_xr2_gate"/>
</component_ref>
<component_ref cmeta:id="id_00038" component="slow_delayed_rectifier_potassium_current">
<component_ref cmeta:id="id_00039" component="slow_delayed_rectifier_potassium_current_xs_gate"/>
</component_ref>
</group>
<connection>
<map_components component_1="membrane" component_2="environment"/>
<map_variables variable_1="time" variable_2="time"/>
</connection>
<connection>
<map_components component_1="reversal_potentials" component_2="environment"/>
<map_variables variable_1="time" variable_2="time"/>
</connection>
<connection>
<map_components component_1="fast_sodium_current" component_2="environment"/>
<map_variables variable_1="time" variable_2="time"/>
</connection>
<connection>
<map_components component_1="L_type_Ca_channel" component_2="environment"/>
<map_variables variable_1="time" variable_2="time"/>
</connection>
<connection>
<map_components component_1="rapid_delayed_rectifier_potassium_current" component_2="environment"/>
<map_variables variable_1="time" variable_2="time"/>
</connection>
<connection>
<map_components component_1="slow_delayed_rectifier_potassium_current" component_2="environment"/>
<map_variables variable_1="time" variable_2="time"/>
</connection>
<connection>
<map_components component_1="time_independent_potassium_current" component_2="environment"/>
<map_variables variable_1="time" variable_2="time"/>
</connection>
<connection>
<map_components component_1="persistent_sodium_current" component_2="environment"/>
<map_variables variable_1="time" variable_2="time"/>
</connection>
<connection>
<map_components component_1="sodium_background_current" component_2="environment"/>
<map_variables variable_1="time" variable_2="time"/>
</connection>
<connection>
<map_components component_1="calcium_background_current" component_2="environment"/>
<map_variables variable_1="time" variable_2="time"/>
</connection>
<connection>
<map_components component_1="transient_outward_current" component_2="environment"/>
<map_variables variable_1="time" variable_2="time"/>
</connection>
<connection>
<map_components component_1="sodium_potassium_pump" component_2="environment"/>
<map_variables variable_1="time" variable_2="time"/>
</connection>
<connection>
<map_components component_1="sodium_calcium_exchanger" component_2="environment"/>
<map_variables variable_1="time" variable_2="time"/>
</connection>
<connection>
<map_components component_1="intracellular_sodium_concentration" component_2="environment"/>
<map_variables variable_1="time" variable_2="time"/>
</connection>
<connection>
<map_components component_1="intracellular_potassium_concentration" component_2="environment"/>
<map_variables variable_1="time" variable_2="time"/>
</connection>
<connection>
<map_components component_1="intracellular_calcium_concentration" component_2="environment"/>
<map_variables variable_1="time" variable_2="time"/>
</connection>
<connection>
<map_components component_1="sarcoplasmic_reticulum_calcium_pump" component_2="environment"/>
<map_variables variable_1="time" variable_2="time"/>
</connection>
<connection>
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