Table 1. Heart failure ionic remodeling.
Ionic Parameter modified | % in the HF model compared to the normal model | Experimental conditions | |
GPB model | ORd model | ||
INaL | 200% | 180% | Isolated cardiomyocytes from LV mid-myocardium of failing dog hearts [88] Whole cell voltage clamp (room temperature) [3] |
τhL | 200% | 180% | Isolated cardiomyocytes from LV mid-myocardium of failing dog hearts [88] Whole cell voltage clamp (room temperature) [3] |
Ito | 40% | 40% | Isolated cardiomyocytes from LV mid-myocardium of failing human hearts. Whole cell voltage clamp (room temperature) [4] |
IK1 | 68% | 68% | Review article. Several species [5] |
INaK | 90% | 70% | Measurements of human myocardial [7] Na,K-ATPase concentration in failing hearts [5]Review article. Several species [6] |
INab | 0 | 100% | Simulation of human HF [89] |
ICab | 153% | Simulation of human HF [89] | |
INCX | 175% | 175% | Simulation of human HF [90] |
JSERCA | 50% | 50% | Isolated cardiomyocytes from LV of failing human hearts. Measurements of Ca2+uptake rates by the SR (37°C) [8] |
Ileak | 300% | 130% | Review article [9] |
EC50SR | 89% | Review article [10]Isolated cardiomyocytes from LV of failing rabbit hearts. Measurements of RyR sensitivity to SR Ca2+ [91] | |
CaMKa | 150% | Review article [10]. Transgenic mice [11] | |
Jrel,NP,∞ Ca2+sensitivity | 80% | Review article [92] |
Changes in original Grandi et al. (GPB) [34] and O'Hara et al. (ORd) [35] models to simulate heart failure (HF) phenotype. The modified parameters are: the late Na+ current (INaL), the time constant of inactivation of the INaL (τ hL), the transient outward K+ current (Ito), the inward rectifier K+ current (IK1), the Na+/K+ pump current (INaK), the background Ca2+ current (ICab), the Na+/Ca2+ exchanger (INCX), the sarcoplasmic reticulum (SR) Ca2+ pump (JSERCA), the SR Ca2+ leak current (Ileak), the Ca2+ sensitivity of SR Ca2+ fluxes (EC50SR), the Ca+2calmodulin-dependent protein kinase II, and the non-phosphorylated Ca2+ release, via ryanodine receptors (Jrel,NP,∞).