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“Thus, calcium inhibits the cardiotonic actions of certain beta-adrenergic agonists, most likely by interfering with signal transduction through the beta-adrenergic receptor complex.”
“In the intact cat, calcium and aminophylline also produce significant elevations in the content of glucose-6-phosphate in the right and left ventricles and left auricle concomitant with their eardiotonic action.”
“In addition, this effect was inhibited by 2 mg/mL nifedipine, suggesting that the cardiotonic mechanism could be responsible for accelerating the inflow of calcium ions.”
“ Cardioprotection activates a number of signaling pathways that reduce the level of triggers (reactive oxygen species and calcium ) or enhances inhibitors of the mitochondrial permeability transition pore at the start of reperfusion.”
“Mg proved to be in vitro a potent antiarrhythmic and cardioprotective agent which is likely to exert its beneficial effects via antagonism of calcium.”
“ Positive inotropic agents increase the rate of calcium accumulation wheras the negative inotropic drug, lignocaine, depresses the rate of calcium accumulation.”