Pump and circumstance.
D001693:Biological Transport, Active; D002118:Calcium / Q000378:metabolism; D002462:Cell Membrane / Q000378:metabolism; D004071:Digitalis Glycosides / Q000378:metabolism; D006321:Heart / Q000502:physiology*; D006801:Humans; D009206:Myocardium / Q000378:metabolism*; D012964:Sodium / Q000378:metabolism
D004071:Digitalis Glycosides; D012964:Sodium; D002118:Calcium