The action of cardiac glycosides on the refractory period of heart tissues.
D002301:Cardiac Glycosides; D004070:Digitalis; D006321:Heart / Q000187:drug effects*; D006801:Humans; D013328:Strophanthins / Q000494:pharmacology*
D002301:Cardiac Glycosides; D013328:Strophanthins
DIGITALIS/effects; HEART/effect of drugs on; STROPHANTHIN/effects