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. Author manuscript; available in PMC: 2013 Jun 1.
Published in final edited form as: J Mech Phys Solids. 2012 Jun 1;60(6):1158–1178. doi: 10.1016/j.jmps.2012.02.004

Table 1.

Parameters of the proposed human cardiac muscle cell model. Symbols, physical interpretations, and parameter values.

R universal gas constant 8.3143 J K−1 mol−1
T temperature 310K
V cytoplasmic volume 16404 µm3
F Faraday constant 96.4867 C/mmol
C membrane capacitance 185 pF
Vsr volume of sarcoplastic reticulum 1094 µm3

cNa0 extracellular sodium concentration 140 mM
cK0 extracellular potassium concentration 5.4 mM
cCa0 extracellular calcium concentration 2 mM

INaKmax
maximum sodium potassium pump current 1.362 pA/pF
INaCamax
maximum sodium calcium exchanger current 1000 pA/pF
Ileakmax
maximum leakage current 0.08 s−1
Iupmax
maximum sarcoplastic reticulum calcium uptake current 0.425 mM/s
Irelmax
maximum sarcoplastic reticulum calcium release current 8.232 mM/s

CNamax
maximum fast sodium conductance 14.838 nS/pF
CbNamax
maximum background sodium conductance 0.00029 nS/pF
CK1max
maximum inward rectifier conductance 5.405 nS/pF
CKrmax
maximum rapid delayed rectifier conductance 0.0096 nS/pF
CKs,epimax
maximum slow delayed rectifier conductance for epicardial cells 0.245 nS/pF
CKs,endomax
maximum slow delayed rectifier conductance for endocardial cells 0.245 nS/pF
CKs,Mmax
maximum slow delayed rectifier conductance for M cells 0.062 nS/pF
CpKmax
maximum potassium pump conductance 0.0146 nS/pF
Ct0,epimax
maximum transient outward conductance for epicardial cells 0.294 nS/pF
Ct0,endomax
maximum transient outward conductance for endocardial cells 0.073 nS/pF
Ct0,Mmax
maximum transient outward conductance for M cells 0.294 nS/pF
CCaLmax
maximum calcium conductance 0.175 mm3/[µFs]
CbCamax
maximum background calcium conductance 0.000592 nS/pF
CpCamax
maximum plateau calcium conductance 0.825 nS/pF

cNaCa half saturation sodium calcium exchanger concentration 87.50 mM
cCaNa half saturation calcium sodium exchanger concentration 1.38 mM
cNaK half saturation sodium potassium pump concentration 40.00 mM
cKNa half saturation potassium sodium pump concentration 1.00 mM
cpCa half saturation plateau calcium concentration 0.0005 mM
cup half saturation sarcoplastic reticulum calcium uptake 0.00025 mM
crel half saturation sarcoplastic reticulum calcium release 0.25 mM
cbuf half saturation calcium buffer concentration 0.001 mM
ctot total calcium buffer concentration 0.15 mM
cbufsr
half saturation sarcoplastic reticulum calcium buffer concentration 0.3 mM
ctotsr
total sarcoplastic reticulum calcium buffer concentration 10 mM

kNaCasat
sodium calcium saturation factor 0.1
pKNa sodium permeability factor 0.03
γrel weighting factor 2.0
γNaCa pump current enhancing factor 2.5
γ sodium calcium factor 0.35