Chaste  Release::3.4
AbstractRushLarsenCardiacCell Class Referenceabstract

#include <AbstractRushLarsenCardiacCell.hpp>

+ Inheritance diagram for AbstractRushLarsenCardiacCell:
+ Collaboration diagram for AbstractRushLarsenCardiacCell:

Public Member Functions

 AbstractRushLarsenCardiacCell (unsigned numberOfStateVariables, unsigned voltageIndex, boost::shared_ptr< AbstractStimulusFunction > pIntracellularStimulus)
 
virtual ~AbstractRushLarsenCardiacCell ()
 
OdeSolution Compute (double tStart, double tEnd, double tSamp=0.0)
 
void ComputeExceptVoltage (double tStart, double tEnd)
 
void SolveAndUpdateState (double tStart, double tEnd)
 
- Public Member Functions inherited from AbstractCardiacCell
 AbstractCardiacCell (boost::shared_ptr< AbstractIvpOdeSolver > pOdeSolver, unsigned numberOfStateVariables, unsigned voltageIndex, boost::shared_ptr< AbstractStimulusFunction > pIntracellularStimulus)
 
virtual ~AbstractCardiacCell ()
 
void Init ()
 
void SetTimestep (double dt)
 
void SetVoltage (double voltage)
 
double GetVoltage ()
 
unsigned GetNumberOfStateVariables () const
 
unsigned GetNumberOfParameters () const
 
std::vector< doubleGetStdVecStateVariables ()
 
const std::vector< std::string > & rGetStateVariableNames () const
 
void SetStateVariables (const std::vector< double > &rVariables)
 
void SetStateVariable (unsigned index, double newValue)
 
void SetStateVariable (const std::string &rName, double newValue)
 
double GetAnyVariable (const std::string &rName, double time=0.0)
 
double GetParameter (const std::string &rParameterName)
 
double GetParameter (unsigned parameterIndex)
 
void SetParameter (const std::string &rParameterName, double value)
 
virtual void SetState (CellModelState state)
 
virtual void SetSlowValues (const std::vector< double > &rSlowValues)
 
virtual void GetSlowValues (std::vector< double > &rSlowValues)
 
virtual bool IsFastOnly ()
 
virtual void AdjustOutOfRangeSlowValues (std::vector< double > &rSlowValues)
 
virtual unsigned GetNumSlowValues ()
 
- Public Member Functions inherited from AbstractCardiacCellInterface
 AbstractCardiacCellInterface (boost::shared_ptr< AbstractIvpOdeSolver > pOdeSolver, unsigned voltageIndex, boost::shared_ptr< AbstractStimulusFunction > pIntracellularStimulus)
 
virtual ~AbstractCardiacCellInterface ()
 
virtual double GetIIonic (const std::vector< double > *pStateVariables=NULL)=0
 
unsigned GetVoltageIndex ()
 
void SetStimulusFunction (boost::shared_ptr< AbstractStimulusFunction > pStimulus)
 
double GetStimulus (double time)
 
void SetIntracellularStimulusFunction (boost::shared_ptr< AbstractStimulusFunction > pStimulus)
 
double GetIntracellularStimulus (double time)
 
double GetIntracellularAreaStimulus (double time)
 
void SetUsedInTissueSimulation (bool tissue=true)
 
virtual boost::shared_ptr
< RegularStimulus
UseCellMLDefaultStimulus ()
 
bool HasCellMLDefaultStimulus ()
 
virtual
AbstractLookupTableCollection
GetLookupTableCollection ()
 
boost::shared_ptr
< AbstractStimulusFunction
GetStimulusFunction ()
 
const boost::shared_ptr
< AbstractStimulusFunction
GetStimulusFunction () const
 
const boost::shared_ptr
< AbstractIvpOdeSolver
GetSolver () const
 
void SetSolver (boost::shared_ptr< AbstractIvpOdeSolver > pSolver)
 
virtual void SetVoltageDerivativeToZero (bool clamp=true)
 
void SetFixedVoltage (double voltage)
 
virtual void SetStretch (double stretch)
 
virtual double GetIntracellularCalciumConcentration ()
 
- Public Member Functions inherited from AbstractOdeSystem
 AbstractOdeSystem (unsigned numberOfStateVariables)
 
virtual ~AbstractOdeSystem ()
 
virtual bool CalculateStoppingEvent (double time, const std::vector< double > &rY)
 
virtual double CalculateRootFunction (double time, const std::vector< double > &rY)
 
bool GetUseAnalyticJacobian ()
 
const std::vector< double > & rGetConstStateVariables () const
 
- Public Member Functions inherited from AbstractParameterisedSystem< std::vector< double > >
 AbstractParameterisedSystem (unsigned numberOfStateVariables)
 
std::vector< double > & rGetStateVariables ()
 
std::vector< doubleGetStateVariables ()
 
void SetStateVariables (const std::vector< double > &rStateVariables)
 
double GetStateVariable (unsigned index) const
 
double GetStateVariable (const std::string &rName) const
 
void SetStateVariable (unsigned index, double newValue)
 
void SetStateVariable (const std::string &rName, double newValue)
 
virtual void VerifyStateVariables ()
 
void SetDefaultInitialConditions (const std::vector< double > &rInitialConditions)
 
void SetDefaultInitialCondition (unsigned index, double initialCondition)
 
std::vector< doubleGetInitialConditions () const
 
void ResetToInitialConditions ()
 
double GetParameter (unsigned index) const
 
double GetParameter (const std::string &rName) const
 
void SetParameter (const std::string &rName, double value)
 
void SetParameter (unsigned index, double value)
 
double GetAnyVariable (unsigned index, double time=0.0, std::vector< double > *pDerivedQuantities=NULL)
 
double GetAnyVariable (const std::string &rName, double time=0.0, std::vector< double > *pDerivedQuantities=NULL)
 
void SetAnyVariable (unsigned index, double value)
 
void SetAnyVariable (const std::string &rName, double value)
 
virtual std::vector< doubleComputeDerivedQuantities (double time, const std::vector< double > &rState)
 
std::vector< doubleComputeDerivedQuantitiesFromCurrentState (double time)
 
- Public Member Functions inherited from AbstractUntemplatedParameterisedSystem
 AbstractUntemplatedParameterisedSystem (unsigned numberOfStateVariables)
 
virtual ~AbstractUntemplatedParameterisedSystem ()
 
boost::shared_ptr< const
AbstractOdeSystemInformation
GetSystemInformation () const
 
std::string GetSystemName () const
 
unsigned GetNumberOfAttributes () const
 
bool HasAttribute (const std::string &rName) const
 
double GetAttribute (const std::string &rName) const
 
unsigned GetNumberOfStateVariables () const
 
const std::vector< std::string > & rGetStateVariableNames () const
 
const std::vector< std::string > & rGetStateVariableUnits () const
 
unsigned GetStateVariableIndex (const std::string &rName) const
 
bool HasStateVariable (const std::string &rName) const
 
std::string GetStateVariableUnits (unsigned index) const
 
unsigned GetNumberOfParameters () const
 
const std::vector< std::string > & rGetParameterNames () const
 
const std::vector< std::string > & rGetParameterUnits () const
 
unsigned GetParameterIndex (const std::string &rName) const
 
bool HasParameter (const std::string &rName) const
 
std::string GetParameterUnits (unsigned index) const
 
unsigned GetNumberOfDerivedQuantities () const
 
const std::vector< std::string > & rGetDerivedQuantityNames () const
 
const std::vector< std::string > & rGetDerivedQuantityUnits () const
 
unsigned GetDerivedQuantityIndex (const std::string &rName) const
 
bool HasDerivedQuantity (const std::string &rName) const
 
std::string GetDerivedQuantityUnits (unsigned index) const
 
unsigned GetAnyVariableIndex (const std::string &rName) const
 
bool HasAnyVariable (const std::string &rName) const
 
std::string GetAnyVariableUnits (unsigned index) const
 
std::string GetAnyVariableUnits (const std::string &rName) const
 

Protected Member Functions

virtual void ComputeOneStepExceptVoltage (const std::vector< double > &rDY, const std::vector< double > &rAlphaOrTau, const std::vector< double > &rBetaOrInf)=0
 
void UpdateTransmembranePotential (const std::vector< double > &rDY)
 
virtual void EvaluateEquations (double time, std::vector< double > &rDY, std::vector< double > &rAlphaOrTau, std::vector< double > &rBetaOrInf)=0
 
- Protected Member Functions inherited from AbstractParameterisedSystem< std::vector< double > >
std::string DumpState (const std::string &rMessage)
 
std::string DumpState (const std::string &rMessage, std::vector< double >Y)
 
std::string DumpState (const std::string &rMessage, std::vector< double >Y, double time)
 
void CheckParametersOnLoad (const std::vector< double > &rParameters, const std::vector< std::string > &rParameterNames)
 

Private Member Functions

template<class Archive >
void serialize (Archive &archive, const unsigned int version)
 
void EvaluateYDerivatives (double time, const std::vector< double > &rY, std::vector< double > &rDY)
 

Friends

class boost::serialization::access
 

Additional Inherited Members

- Protected Attributes inherited from AbstractCardiacCell
double mDt
 
- Protected Attributes inherited from AbstractCardiacCellInterface
unsigned mVoltageIndex
 
boost::shared_ptr
< AbstractIvpOdeSolver
mpOdeSolver
 
boost::shared_ptr
< AbstractStimulusFunction
mpIntracellularStimulus
 
bool mSetVoltageDerivativeToZero
 
bool mIsUsedInTissue
 
bool mHasDefaultStimulusFromCellML
 
double mFixedVoltage
 
- Protected Attributes inherited from AbstractOdeSystem
bool mUseAnalyticJacobian
 
- Protected Attributes inherited from AbstractParameterisedSystem< std::vector< double > >
std::vector< doublemStateVariables
 
std::vector< doublemParameters
 
- Protected Attributes inherited from AbstractUntemplatedParameterisedSystem
unsigned mNumberOfStateVariables
 
boost::shared_ptr
< AbstractOdeSystemInformation
mpSystemInfo
 

Detailed Description

This is the base class for cardiac cells solved using the Rush-Larsen method. It is based on code contributed by Megan Lewis, University of Saskatchewan

The basic approach to solving such models is:

  • Compute alpha & beta values for gating variables, and derivatives for other state variables.
  • Update the transmembrane potential, either from solving an external PDE, or using a forward Euler step.
  • Update any eligible gating variables (or similar) with Rush-Larsen scheme.
  • Update the remaining state variables using a forward Euler step.

Definition at line 58 of file AbstractRushLarsenCardiacCell.hpp.

Constructor & Destructor Documentation

AbstractRushLarsenCardiacCell::AbstractRushLarsenCardiacCell ( unsigned  numberOfStateVariables,
unsigned  voltageIndex,
boost::shared_ptr< AbstractStimulusFunction pIntracellularStimulus 
)

Standard constructor for a cell.

Parameters
numberOfStateVariablesthe size of the ODE system
voltageIndexthe index of the variable representing the transmembrane potential within the state variable vector
pIntracellularStimulusthe intracellular stimulus function

Some notes for future reference:

  • It's a pity that inheriting from AbstractCardiacCell forces us to store a null pointer (for the unused ODE solver) in every instance. We may want to revisit this design decision at a later date.

Definition at line 45 of file AbstractRushLarsenCardiacCell.cpp.

AbstractRushLarsenCardiacCell::~AbstractRushLarsenCardiacCell ( )
virtual

Virtual destructor

Definition at line 54 of file AbstractRushLarsenCardiacCell.cpp.

Member Function Documentation

OdeSolution AbstractRushLarsenCardiacCell::Compute ( double  tStart,
double  tEnd,
double  tSamp = 0.0 
)
virtual

Simulates this cell's behaviour between the time interval [tStart, tEnd], with timestep mDt. Uses a forward Euler step to update the transmembrane potential at each timestep.

The length of the time interval must be a multiple of the timestep.

Parameters
tStartbeginning of the time interval to simulate
tEndend of the time interval to simulate
tSampsampling interval for returned results (defaults to mDt)
Returns
the values of each state variable, at intervals of tSamp.

Reimplemented from AbstractCardiacCell.

Definition at line 57 of file AbstractRushLarsenCardiacCell.cpp.

References ComputeOneStepExceptVoltage(), EvaluateEquations(), AbstractCardiacCell::mDt, AbstractUntemplatedParameterisedSystem::mNumberOfStateVariables, AbstractUntemplatedParameterisedSystem::mpSystemInfo, OdeSolution::rGetSolutions(), AbstractParameterisedSystem< std::vector< double > >::rGetStateVariables(), OdeSolution::rGetTimes(), OdeSolution::SetNumberOfTimeSteps(), OdeSolution::SetOdeSystemInformation(), UpdateTransmembranePotential(), and AbstractParameterisedSystem< std::vector< double > >::VerifyStateVariables().

void AbstractRushLarsenCardiacCell::ComputeExceptVoltage ( double  tStart,
double  tEnd 
)
virtual

Simulates this cell's behaviour between the time interval [tStart, tEnd], with timestep mDt. The transmembrane potential is kept fixed throughout, but the other state variables are updated.

The length of the time interval must be a multiple of the timestep.

Parameters
tStartbeginning of the time interval to simulate
tEndend of the time interval to simulate

Reimplemented from AbstractCardiacCell.

Definition at line 106 of file AbstractRushLarsenCardiacCell.cpp.

References TimeStepper::AdvanceOneTimeStep(), ComputeOneStepExceptVoltage(), EvaluateEquations(), TimeStepper::GetTime(), TimeStepper::IsTimeAtEnd(), AbstractCardiacCell::mDt, AbstractUntemplatedParameterisedSystem::mNumberOfStateVariables, AbstractCardiacCellInterface::mSetVoltageDerivativeToZero, and AbstractParameterisedSystem< std::vector< double > >::VerifyStateVariables().

virtual void AbstractRushLarsenCardiacCell::ComputeOneStepExceptVoltage ( const std::vector< double > &  rDY,
const std::vector< double > &  rAlphaOrTau,
const std::vector< double > &  rBetaOrInf 
)
protectedpure virtual

Update the values of elligible gating variables using the Rush-Larsen method, and of other non-V variables using forward Euler, for a single timestep.

Note
This method must be provided by subclasses.
Parameters
rDYvector containing dy/dt values
rAlphaOrTauvector containing alpha or tau values, depending on the formulation
rBetaOrInfvector containing beta or inf values, depending on the formulation

Referenced by Compute(), ComputeExceptVoltage(), and SolveAndUpdateState().

virtual void AbstractRushLarsenCardiacCell::EvaluateEquations ( double  time,
std::vector< double > &  rDY,
std::vector< double > &  rAlphaOrTau,
std::vector< double > &  rBetaOrInf 
)
protectedpure virtual

Compute dy/dt and alpha and beta values.

Note
This method must be provided by subclasses.
Parameters
timestart of this timestep
rDYvector to fill in with dy/dt values
rAlphaOrTauvector to fill in with alpha or tau values, depending on the formulation
rBetaOrInfvector to fill in with beta or inf values, depending on the formulation

Referenced by Compute(), ComputeExceptVoltage(), and SolveAndUpdateState().

void AbstractRushLarsenCardiacCell::EvaluateYDerivatives ( double  time,
const std::vector< double > &  rY,
std::vector< double > &  rDY 
)
inlineprivatevirtual

This function should never be called - the cell class incorporates its own solver.

Parameters
time
rY
rDY

Implements AbstractOdeSystem.

Definition at line 142 of file AbstractRushLarsenCardiacCell.hpp.

References NEVER_REACHED.

template<class Archive >
void AbstractRushLarsenCardiacCell::serialize ( Archive &  archive,
const unsigned int  version 
)
inlineprivate

Archive the member variables.

Parameters
archive
version

Definition at line 70 of file AbstractRushLarsenCardiacCell.hpp.

void AbstractRushLarsenCardiacCell::SolveAndUpdateState ( double  tStart,
double  tEnd 
)
virtual

Simulate this cell's behaviour between the time interval [tStart, tEnd], with timestemp mDt, updating the internal state variable values.

Parameters
tStartbeginning of the time interval to simulate
tEndend of the time interval to simulate

Reimplemented from AbstractCardiacCell.

Definition at line 130 of file AbstractRushLarsenCardiacCell.cpp.

References TimeStepper::AdvanceOneTimeStep(), ComputeOneStepExceptVoltage(), EvaluateEquations(), TimeStepper::GetTime(), TimeStepper::IsTimeAtEnd(), AbstractCardiacCell::mDt, AbstractUntemplatedParameterisedSystem::mNumberOfStateVariables, UpdateTransmembranePotential(), and AbstractParameterisedSystem< std::vector< double > >::VerifyStateVariables().

void AbstractRushLarsenCardiacCell::UpdateTransmembranePotential ( const std::vector< double > &  rDY)
protected

Perform a forward Euler step to update the transmembrane potential.

Parameters
rDYvector containing dy/dt values

Definition at line 149 of file AbstractRushLarsenCardiacCell.cpp.

References AbstractCardiacCellInterface::GetVoltageIndex(), AbstractCardiacCell::mDt, and AbstractParameterisedSystem< std::vector< double > >::rGetStateVariables().

Referenced by Compute(), and SolveAndUpdateState().

Friends And Related Function Documentation

friend class boost::serialization::access
friend

Needed for serialization.

Definition at line 62 of file AbstractRushLarsenCardiacCell.hpp.


The documentation for this class was generated from the following files: