- Author:
- pmr2.import <nobody@models.cellml.org>
- Date:
- 2007-12-04 04:00:45+13:00
- Desc:
- committing version05 of sakmann_spindler_bryant_linz_noble_2000
- Permanent Source URI:
- http://models.cellml.org/workspace/sakmann_spindler_bryant_linz_noble_2000/rawfile/ff053f13f4679d08bc15b54da6ef748eba9ea959/sakmann_spindler_bryant_linz_noble_2000_b.cellml
<?xml version='1.0' encoding='utf-8'?>
<!--
This CellML file was generated on 09/10/2007 at 13:12:43 using:
COR (0.9.31.797)
Copyright 2002-2007 Dr Alan Garny
http://COR.physiol.ox.ac.uk/ - COR@physiol.ox.ac.uk
CellML 1.0 was used to generate this cellular model
http://www.CellML.org/
--><model xmlns="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:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:bqs="http://www.cellml.org/bqs/1.0#" xmlns:cellml="http://www.cellml.org/cellml/1.0#" xmlns:dcterms="http://purl.org/dc/terms/" xmlns:vCard="http://www.w3.org/2001/vcard-rdf/3.0#" xmlns:ns7="http://www.cellml.org/metadata/simulation/1.0#" name="sakmann_spindler_bryant_linz_noble_2000_epi-cell" cmeta:id="sakmann_spindler_bryant_linz_noble_2000_epi-cell">
<documentation xmlns="http://cellml.org/tmp-documentation">
<article>
<articleinfo>
<title>Distribution of a Persistent Sodium Current Across theVentricular Wall in Guinea Pigs</title>
<author>
<firstname>Penny</firstname>
<surname>Noble</surname>
<affiliation>
<shortaffil>Oxford University</shortaffil>
</affiliation>
</author>
</articleinfo>
<section id="sec_status">
<title>Model Status</title>
<para>
This model has been curated and unit checked and is known to run in PCEnv and COR. This variant of the model is parameterised for the cardiac EPICARDIAL CELL.
</para>
</section>
<sect1 id="sec_structure">
<title>Model Structure</title>
<para>
This model was based on the paper "Distribution of a Persistent Sodium Current Across theVentricular Wall in Guinea Pigs" by Bernhard F.A.S. Sakmann, Anthony J. Spindler, Simon M. Bryant, Klaus W. Linz and Denis Noble.
Reference: Circulation Research 2000 Nov 10;87(10):910-4.
</para>
<para>
The following is the abstract from the paper:
"A tetrodotoxin-sensitive persistent sodium current, IpNa, was found in guinea pig ventricular myocytes bywhole-cell patch clamping. This current was characterized in cells derived from the basal left ventricular subendocardium,midmyocardium, and subepicardium. Midmyocardial cells show a statistically significant (P,0.05) smaller IpNathan subendocardial and subepicardial myocytes. There was no significant difference in IpNa current density betweensubepicardial and subendocardial cells. Computer modeling studies support a role of this current in the dispersion ofaction potential duration across the ventricular wall."
</para>
</sect1>
</article>
</documentation>
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<ci>V</ci>
<cn cellml:units="millivolt">30</cn>
</apply>
</apply>
<apply>
<minus/>
<apply>
<exp/>
<apply>
<times/>
<cn cellml:units="per_millivolt">0.0687</cn>
<apply>
<plus/>
<ci>V</ci>
<cn cellml:units="millivolt">30</cn>
</apply>
</apply>
</apply>
<cn cellml:units="dimensionless">1</cn>
</apply>
</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 name="fast_sodium_current">
<variable units="nanoA" public_interface="out" name="i_Na"/>
<variable units="microS" name="g_Na"/>
<variable units="per_microF" name="nachanneldensity" initial_value="1075"/>
<variable units="microS" name="gnachannel" initial_value="20"/>
<variable units="millivolt" public_interface="in" name="E_mh"/>
<variable units="microF" public_interface="in" name="Cm"/>
<variable units="second" public_interface="in" private_interface="out" name="time"/>
<variable units="millivolt" public_interface="in" private_interface="out" name="V"/>
<variable units="dimensionless" private_interface="in" name="m"/>
<variable units="dimensionless" private_interface="in" name="h"/>
<variable units="dimensionless" private_interface="in" name="proton"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>g_Na</ci>
<apply>
<divide/>
<apply>
<times/>
<ci>nachanneldensity</ci>
<ci>Cm</ci>
<ci>gnachannel</ci>
<apply>
<plus/>
<apply>
<divide/>
<cn cellml:units="dimensionless">1.26</cn>
<apply>
<plus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<divide/>
<ci>proton</ci>
<apply>
<times/>
<cn cellml:units="dimensionless">1000</cn>
<cn cellml:units="dimensionless">2.5119e-6</cn>
</apply>
</apply>
</apply>
</apply>
<cn cellml:units="dimensionless">0.34</cn>
</apply>
</apply>
<cn cellml:units="dimensionless">1.58</cn>
</apply>
</apply>
<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 name="fast_sodium_current_m_gate">
<variable units="dimensionless" public_interface="out" name="m" initial_value="0.0026891"/>
<variable units="per_second" name="alpha_m"/>
<variable units="per_second" name="beta_m"/>
<variable units="millivolt" public_interface="in" name="V"/>
<variable units="second" public_interface="in" name="time"/>
<variable units="millivolt" name="delta_m" initial_value="1e-5"/>
<variable units="millivolt" name="E0_m"/>
<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 name="fast_sodium_current_h_gate">
<variable units="dimensionless" public_interface="out" name="h" initial_value="0.9873107"/>
<variable units="per_second" name="alpha_h"/>
<variable units="per_second" name="beta_h"/>
<variable units="dimensionless" public_interface="out" name="proton" initial_value="3.98e-5"/>
<variable units="millivolt" name="shifth"/>
<variable units="millivolt" public_interface="in" name="V"/>
<variable units="second" public_interface="in" name="time"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>shifth</ci>
<apply>
<minus/>
<apply>
<divide/>
<cn cellml:units="millivolt">32.7</cn>
<apply>
<plus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<divide/>
<apply>
<divide/>
<ci>proton</ci>
<cn cellml:units="dimensionless">1000</cn>
</apply>
<cn cellml:units="dimensionless">2.5119e-6</cn>
</apply>
</apply>
</apply>
<cn cellml:units="millivolt">32.18</cn>
</apply>
</apply>
<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>shifth</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>shifth</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 name="persistent_sodium_current">
<variable units="nanoA" public_interface="out" name="i_p_Na"/>
<variable units="microS" name="g_pna" initial_value="0.005"/>
<variable units="millivolt" public_interface="in" name="E_Na"/>
<variable units="second" public_interface="in" name="time"/>
<variable units="millivolt" public_interface="in" name="V"/>
<variable units="microF" public_interface="in" name="Cm"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<ci>i_p_Na</ci>
<apply>
<divide/>
<apply>
<divide/>
<apply>
<times/>
<ci>Cm</ci>
<cn cellml:units="per_microF">1000000</cn>
<ci>g_pna</ci>
<apply>
<minus/>
<ci>V</ci>
<cn cellml:units="millivolt">51.5397</cn>
</apply>
</apply>
<apply>
<plus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<exp/>
<apply>
<divide/>
<apply>
<minus/>
<apply>
<plus/>
<ci>V</ci>
<cn cellml:units="millivolt">58.0111</cn>
</apply>
</apply>
<cn cellml:units="millivolt">7.0332</cn>
</apply>
</apply>
</apply>
</apply>
<cn cellml:units="dimensionless">1000</cn>
</apply>
</apply>
</math>
</component>
<component name="sodium_background_current">
<variable units="nanoA" public_interface="out" name="i_b_Na"/>
<variable units="microS" name="g_bna" initial_value="0.0006"/>
<variable units="millimolar" public_interface="in" name="Na_i"/>
<variable units="millivolt" public_interface="in" name="E_Na"/>
<variable units="second" public_interface="in" name="time"/>
<variable units="millivolt" public_interface="in" name="V"/>
<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 name="L_type_Ca_channel">
<variable units="nanoA" public_interface="out" name="i_Ca_L_Ca_cyt"/>
<variable units="nanoA" public_interface="out" name="i_Ca_L_K_cyt"/>
<variable units="nanoA" public_interface="out" name="i_Ca_L_Na_cyt"/>
<variable units="nanoA" public_interface="out" name="i_Ca_L_Ca_ds"/>
<variable units="nanoA" public_interface="out" name="i_Ca_L_K_ds"/>
<variable units="nanoA" public_interface="out" name="i_Ca_L_Na_ds"/>
<variable units="nanoA" public_interface="out" name="i_Ca_L"/>
<variable units="nanoA_per_millimolar" name="P_Ca_L" initial_value="0.11"/>
<variable units="dimensionless" name="P_CaK" initial_value="0.002"/>
<variable units="dimensionless" name="P_CaNa" initial_value="0.01"/>
<variable units="millimolar" public_interface="in" name="Ca_o"/>
<variable units="millimolar" public_interface="in" private_interface="out" name="Ca_i"/>
<variable units="millimolar" public_interface="in" private_interface="out" name="Ca_ds"/>
<variable units="millimolar" public_interface="in" name="K_o"/>
<variable units="millimolar" public_interface="in" name="K_i"/>
<variable units="millimolar" public_interface="in" name="Na_o"/>
<variable units="millimolar" public_interface="in" name="Na_i"/>
<variable units="joule_per_kilomole_kelvin" public_interface="in" name="R"/>
<variable units="coulomb_per_mole" public_interface="in" name="F"/>
<variable units="kelvin" public_interface="in" name="T"/>
<variable units="second" public_interface="in" private_interface="out" name="time"/>
<variable units="millivolt" public_interface="in" private_interface="out" name="V"/>
<variable units="dimensionless" private_interface="in" name="d"/>
<variable units="dimensionless" private_interface="in" name="f"/>
<variable units="dimensionless" private_interface="in" name="f2"/>
<variable units="dimensionless" private_interface="in" name="f2ds"/>
<variable units="millimolar" private_interface="out" name="Km_f2" initial_value="100000"/>
<variable units="millimolar" private_interface="out" name="Km_f2ds" initial_value="0.001"/>
<variable units="per_second" public_interface="out" private_interface="out" name="R_decay" initial_value="20"/>
<variable units="dimensionless" name="FrICa" initial_value="1"/>
<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>f</ci>
<ci>f2</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>f</ci>
<ci>f2</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>f</ci>
<ci>f2</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>f</ci>
<ci>f2ds</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>f</ci>
<ci>f2ds</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>f</ci>
<ci>f2ds</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 name="L_type_Ca_channel_d_gate">
<variable units="dimensionless" public_interface="out" name="d" initial_value="1.44e-4"/>
<variable units="per_second" name="alpha_d"/>
<variable units="per_second" name="beta_d"/>
<variable units="millivolt" public_interface="in" name="V"/>
<variable units="second" public_interface="in" name="time"/>
<variable units="millivolt" name="E0_d"/>
<variable units="dimensionless" name="speed_d" initial_value="3"/>
<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">7.2</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>
<apply>
<times/>
<cn cellml:units="dimensionless">2.5</cn>
<cn cellml:units="millivolt">7.2</cn>
</apply>
</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 name="L_type_Ca_channel_f_gate">
<variable units="dimensionless" public_interface="out" name="f" initial_value="0.9999993"/>
<variable units="per_second" name="alpha_f"/>
<variable units="per_second" name="beta_f"/>
<variable units="millivolt" public_interface="in" name="V"/>
<variable units="second" public_interface="in" name="time"/>
<variable units="dimensionless" name="speed_f" initial_value="0.3"/>
<variable units="millivolt" name="delta_f" initial_value="0.0001"/>
<variable units="millivolt" name="E0_f"/>
<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">5.1</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">5.1</cn>
</apply>
</apply>
</apply>
</apply>
</apply>
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>f</ci>
</apply>
<apply>
<times/>
<ci>speed_f</ci>
<apply>
<minus/>
<apply>
<times/>
<ci>alpha_f</ci>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<ci>f</ci>
</apply>
</apply>
<apply>
<times/>
<ci>beta_f</ci>
<ci>f</ci>
</apply>
</apply>
</apply>
</apply>
</math>
</component>
<component name="L_type_Ca_channel_f2_gate">
<variable units="dimensionless" public_interface="out" name="f2" initial_value="0.254433"/>
<variable units="millimolar" public_interface="in" name="Km_f2"/>
<variable units="millimolar" public_interface="in" name="Ca_i"/>
<variable units="millivolt" public_interface="in" name="V"/>
<variable units="second" public_interface="in" name="time"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>f2</ci>
</apply>
<apply>
<minus/>
<cn cellml:units="per_second">1</cn>
<apply>
<times/>
<cn cellml:units="per_second">1</cn>
<apply>
<plus/>
<apply>
<divide/>
<ci>Ca_i</ci>
<apply>
<plus/>
<ci>Km_f2</ci>
<ci>Ca_i</ci>
</apply>
</apply>
<ci>f2</ci>
</apply>
</apply>
</apply>
</apply>
</math>
</component>
<component name="L_type_Ca_channel_f2ds_gate">
<variable units="dimensionless" public_interface="out" name="f2ds" initial_value="0.9292189"/>
<variable units="millimolar" public_interface="in" name="Km_f2ds"/>
<variable units="per_second" public_interface="in" name="R_decay"/>
<variable units="millimolar" public_interface="in" name="Ca_ds"/>
<variable units="millivolt" public_interface="in" name="V"/>
<variable units="second" public_interface="in" name="time"/>
<math xmlns="http://www.w3.org/1998/Math/MathML">
<apply>
<eq/>
<apply>
<diff/>
<bvar>
<ci>time</ci>
</bvar>
<ci>f2ds</ci>
</apply>
<apply>
<times/>
<ci>R_decay</ci>
<apply>
<minus/>
<cn cellml:units="dimensionless">1</cn>
<apply>
<plus/>
<apply>
<divide/>
<ci>Ca_ds</ci>
<apply>
<plus/>
<ci>Km_f2ds</ci>
<ci>Ca_ds</ci>
</apply>
</apply>
<ci>f2ds</ci>
</apply>
</apply>
</apply>
</apply>
</math>
</component>
<component name="calcium_background_current">
<variable units="nanoA" public_interface="out" name="i_b_Ca"/>
<variable units="microS" name="g_bca" initial_value="0.00025"/>
<variable units="millivolt" public_interface="in" name="E_Ca"/>
<variable units="second" public_interface="in" name="time"/>
<variable units="millivolt" public_interface="in" name="V"/>
<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 name="transient_outward_current">
<variable units="nanoA" public_interface="out" name="i_to"/>
<variable units="microS" name="g_to" initial_value="0.005"/>
<variable units="dimensionless" name="g_tos" initial_value="0"/>
<variable units="millivolt" public_interface="in" name="E_K"/>
<variable units="millivolt" public_interface="in" private_interface="out" name="V"/>
<variable units="second" public_interface="in" private_interface="out" name="time"/>
<variable units="dimensionless" private_interface="in" name="s"/>
<variable units="dimensionless" private_interface="in" name="r"/>
<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 name="transient_outward_current_s_gate">
<variable units="dimensionless" public_interface="out" name="s" initial_value="0.7352365"/>
<variable units="per_second" name="alpha_s"/>
<variable units="per_second" name="beta_s"/>
<variable units="millivolt" public_interface="in" name="V"/>
<variable units="second" public_interface="in" name="time"/>
<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 name="transient_outward_current_r_gate">
<variable units="dimensionless" public_interface="out" name="r" initial_value="0"/>
<variable units="millivolt" public_interface="in" name="V"/>
<variable units="second" public_interface="in" name="time"/>
<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 name="sodium_potassium_pump">
<variable units="nanoA" public_interface="out" name="i_NaK"/>
<variable units="nanoA" name="i_NaK_max" initial_value="0.7"/>
<variable units="millimolar" name="K_mK" initial_value="1"/>
<variable units="millimolar" name="K_mNa" initial_value="40"/>
<variable units="millimolar" public_interface="in" name="K_o"/>
<variable units="millimolar" public_interface="in" name="Na_i"/>
<variable units="second" public_interface="in" name="time"/>
<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 name="sodium_calcium_exchanger">
<variable units="nanoA" public_interface="out" name="i_NaCa"/>
<variable units="nanoA" public_interface="out" name="i_NaCa_cyt"/>
<variable units="nanoA" public_interface="out" name="i_NaCa_ds"/>
<variable units="nanoA" name="k_NaCa" initial_value="0.00012"/>
<variable units="dimensionless" name="n_NaCa" initial_value="3"/>
<variable units="dimensionless" name="d_NaCa" initial_value="0"/>
<variable units="dimensionless" name="gamma" initial_value="0.5"/>
<variable units="dimensionless" name="FRiNaCa" initial_value="0.001"/>
<variable units="millimolar" public_interface="in" name="Na_i"/>
<variable units="millimolar" public_interface="in" name="Na_o"/>
<variable units="millimolar" public_interface="in" name="Ca_i"/>
<variable units="millimolar" public_interface="in" name="Ca_ds"/>
<variable units="millimolar" public_interface="in" name="Ca_o"/>
<variable units="joule_per_kilomole_kelvin" public_interface="in" name="R"/>
<variable units="coulomb_per_mole" public_interface="in" name="F"/>
<variable units="kelvin" public_interface="in" name="T"/>
<variable units="millivolt" public_interface="in" name="V"/>
<variable units="second" public_interface="in" name="time"/>
<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 name="sarcoplasmic_reticulum_calcium_pump">
<variable units="millimolar_per_second" public_interface="out" name="i_up"/>
<variable units="dimensionless" name="K_1"/>
<variable units="millimolar" name="K_2"/>
<variable units="millimolar" name="K_cyca" initial_value="0.0003"/>
<variable units="dimensionless" name="K_xcs" initial_value="0.4"/>
<variable units="millimolar" name="K_srca" initial_value="0.5"/>
<variable units="millimolar_per_second" name="alpha_up" initial_value="0.4"/>
<variable units="millimolar_per_second" name="beta_up" initial_value="0.03"/>
<variable units="millimolar" public_interface="in" name="Ca_i"/>
<variable units="millimolar" public_interface="in" name="Ca_up"/>
<variable units="second" public_interface="in" name="time"/>
<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 name="calcium_translocation">
<variable units="millimolar_per_second" public_interface="out" name="i_trans"/>
<variable units="millimolar" public_interface="in" name="Ca_rel"/>
<variable units="millimolar" public_interface="in" name="Ca_up"/>
<variable units="second" public_interface="in" name="time"/>
<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 name="calcium_release">
<variable units="millimolar_per_second" public_interface="out" name="i_rel"/>
<variable units="dimensionless" name="VoltDep"/>
<variable units="dimensionless" name="RegBindSite"/>
<variable units="dimensionless" name="CaiReg"/>
<variable units="dimensionless" name="CadsReg"/>
<variable units="per_second" name="ActRate"/>
<variable units="per_second" name="InactRate"/>
<variable units="per_second" name="K_leak_rate" initial_value="0.05"/>
<variable units="per_second" name="K_m_rel" initial_value="250"/>
<variable units="millimolar" name="K_m_Ca_cyt" initial_value="0.0005"/>
<variable units="millimolar" name="K_m_Ca_ds" initial_value="0.01"/>
<variable units="dimensionless" name="PrecFrac"/>
<variable units="dimensionless" name="ActFrac" initial_value="0.0101647"/>
<variable units="dimensionless" name="ProdFrac" initial_value="0.9584464"/>
<variable units="dimensionless" name="SpeedRel"/>
<variable units="second" public_interface="in" name="time"/>
<variable units="millivolt" public_interface="in" name="V"/>
<variable units="millimolar" public_interface="in" name="Ca_i"/>
<variable units="millimolar" public_interface="in" name="Ca_ds"/>
<variable units="millimolar" public_interface="in" name="Ca_rel"/>
<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">500</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 units="millimolar" public_interface="out" name="Na_o" initial_value="140"/>
</component>
<component name="intracellular_sodium_concentration">
<variable units="millimolar" public_interface="out" name="Na_i" initial_value="5.6633707"/>
<variable units="micrometre3" public_interface="in" name="V_i"/>
<variable units="second" public_interface="in" name="time"/>
<variable units="coulomb_per_mole" public_interface="in" name="F"/>
<variable units="nanoA" public_interface="in" name="i_Na"/>
<variable units="nanoA" public_interface="in" name="i_b_Na"/>
<variable units="nanoA" public_interface="in" name="i_p_Na"/>
<variable units="nanoA" public_interface="in" name="i_Ca_L_Na_cyt"/>
<variable units="nanoA" public_interface="in" name="i_Ca_L_Na_ds"/>
<variable units="nanoA" public_interface="in" name="i_NaK"/>
<variable units="nanoA" public_interface="in" name="i_NaCa_cyt"/>
<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 units="millimolar" public_interface="out" name="Ca_o" initial_value="2"/>
</component>
<component name="extracellular_potassium_concentration">
<variable units="millimolar" public_interface="out" name="K_o" initial_value="4"/>
</component>
<component name="intracellular_potassium_concentration">
<variable units="millimolar" public_interface="out" name="K_i" initial_value="138.7963753"/>
<variable units="micrometre3" public_interface="in" name="V_i"/>
<variable units="nanoA" public_interface="in" name="i_K1"/>
<variable units="nanoA" public_interface="in" name="i_Kr"/>
<variable units="nanoA" public_interface="in" name="i_Ks"/>
<variable units="nanoA" public_interface="in" name="i_Ca_L_K_cyt"/>
<variable units="nanoA" public_interface="in" name="i_Ca_L_K_ds"/>
<variable units="nanoA" public_interface="in" name="i_to"/>
<variable units="nanoA" public_interface="in" name="i_NaK"/>
<variable units="second" public_interface="in" name="time"/>
<variable units="coulomb_per_mole" public_interface="in" name="F"/>
<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 units="millimolar" public_interface="out" name="Ca_i" initial_value="5.44e-5"/>
<variable units="millimolar" public_interface="out" name="Ca_ds" initial_value="0.0018991"/>
<variable units="millimolar" public_interface="out" name="Ca_up" initial_value="0.7625025"/>
<variable units="millimolar" public_interface="out" name="Ca_rel" initial_value="0.7368094"/>
<variable units="millimolar" name="Ca_Calmod" initial_value="0.0018544"/>
<variable units="millimolar" name="Ca_Trop" initial_value="0.0012852"/>
<variable units="millimolar" name="Calmod" initial_value="0.02"/>
<variable units="millimolar" name="Trop" initial_value="0.05"/>
<variable units="per_millimolar_second" name="alpha_Calmod" initial_value="100000"/>
<variable units="per_second" name="beta_Calmod" initial_value="50"/>
<variable units="per_millimolar_second" name="alpha_Trop" initial_value="100000"/>
<variable units="per_second" name="beta_Trop" initial_value="200"/>
<variable units="micrometre" name="radius" initial_value="12"/>
<variable units="micrometre" name="length" initial_value="74"/>
<variable units="micrometre3" public_interface="out" name="V_i"/>
<variable units="micrometre3" name="V_Cell"/>
<variable units="dimensionless" name="V_i_ratio"/>
<variable units="dimensionless" name="V_ds_ratio" initial_value="0.1"/>
<variable units="dimensionless" name="V_rel_ratio" initial_value="0.1"/>
<variable units="dimensionless" name="V_e_ratio" initial_value="0.4"/>
<variable units="dimensionless" name="V_up_ratio" initial_value="0.01"/>
<variable units="per_second" name="Kdecay" initial_value="10"/>
<variable units="millimolar_per_second" public_interface="in" name="i_up"/>
<variable units="millimolar_per_second" public_interface="in" name="i_trans"/>
<variable units="millimolar_per_second" public_interface="in" name="i_rel"/>
<variable units="nanoA" public_interface="in" name="i_NaCa_cyt"/>
<variable units="nanoA" public_interface="in" name="i_NaCa_ds"/>
<variable units="nanoA" public_interface="in" name="i_Ca_L_Ca_cyt"/>
<variable units="nanoA" public_interface="in" name="i_Ca_L_Ca_ds"/>
<variable units="nanoA" public_interface="in" name="i_b_Ca"/>
<variable units="coulomb_per_mole" public_interface="in" name="F"/>
<variable units="second" public_interface="in" name="time"/>
<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>
<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>
<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="containment"/>
<component_ref component="membrane">
<component_ref component="fast_sodium_current">
<component_ref component="fast_sodium_current_m_gate"/>
<component_ref component="fast_sodium_current_h_gate"/>
</component_ref>
<component_ref component="L_type_Ca_channel">
<component_ref component="L_type_Ca_channel_d_gate"/>
<component_ref component="L_type_Ca_channel_f_gate"/>
<component_ref component="L_type_Ca_channel_f2_gate"/>
<component_ref component="L_type_Ca_channel_f2ds_gate"/>
</component_ref>
<component_ref component="rapid_delayed_rectifier_potassium_current">
<component_ref component="rapid_delayed_rectifier_potassium_current_xr_gate"/>
</component_ref>
<component_ref component="slow_delayed_rectifier_potassium_current">
<component_ref component="slow_delayed_rectifier_potassium_current_xs_gate"/>
</component_ref>
<component_ref component="time_independent_potassium_current"/>
<component_ref component="persistent_sodium_current"/>
<component_ref component="sodium_background_current"/>
<component_ref component="calcium_background_current"/>
<component_ref component="transient_outward_current">
<component_ref component="transient_outward_current_s_gate"/>
<component_ref component="transient_outward_current_r_gate"/>
</component_ref>
<component_ref component="sodium_potassium_pump"/>
<component_ref component="sodium_calcium_exchanger"/>
<component_ref component="sarcoplasmic_reticulum_calcium_pump"/>
<component_ref component="calcium_translocation"/>
<component_ref component="calcium_release"/>
<component_ref component="extracellular_sodium_concentration"/>
<component_ref component="intracellular_sodium_concentration"/>
<component_ref component="extracellular_potassium_concentration"/>
<component_ref component="intracellular_potassium_concentration"/>
<component_ref component="extracellular_calcium_concentration"/>
<component_ref component="intracellular_calcium_concentration"/>
<component_ref component="reversal_potentials"/>
</component_ref>
</group>
<group>
<relationship_ref relationship="encapsulation"/>
<component_ref component="fast_sodium_current">
<component_ref component="fast_sodium_current_m_gate"/>
<component_ref component="fast_sodium_current_h_gate"/>
</component_ref>
<component_ref component="L_type_Ca_channel">
<component_ref component="L_type_Ca_channel_d_gate"/>
<component_ref component="L_type_Ca_channel_f_gate"/>
<component_ref component="L_type_Ca_channel_f2_gate"/>
<component_ref component="L_type_Ca_channel_f2ds_gate"/>
</component_ref>
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<dcterms:W3CDTF>2006-01-01</dcterms:W3CDTF>
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<rdf:value>This model was based on the paper "Distribution of a Persistent Sodium Current Across theVentricular Wall in Guinea Pigs" by Bernhard F.A.S. Sakmann, Anthony J. Spindler, Simon M. Bryant, Klaus W. Linz and Denis Noble.
Reference: Circulation Research 2000 Nov 10;87(10):910-4. </rdf:value>
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<vCard:FN>James Lawson</vCard:FN>
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<dc:title>Circulation Research</dc:title>
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<rdf:value>penny.noble@dpag.ox.ac.uk</rdf:value>
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<dcterms:W3CDTF>2000-11-10</dcterms:W3CDTF>
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<dc:publisher>Department of Physiology, Anatomy & Genetics, University of Oxford</dc:publisher>
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<rdf:value>Units checked, curated.</rdf:value>
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<vCard:FN>James Lawson</vCard:FN>
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<dcterms:W3CDTF>2006-12-12T15:55:00+13:00</dcterms:W3CDTF>
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<rdf:value>This model has been curated and unit checked and is known to run in PCEnv and COR. This variant of the model is parameterised for the cardiac EPICARDIAL CELL.</rdf:value>
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