Relations among Na+,K+-ATPase activity, sodium pump activity, transmembrane sodium movement, and cardiac contractility.

4-Chloromercuribenzenesulfonate/pharmacology Adenosine Triphosphatases/antagonists & inhibitors,metabolism Animals Biological Transport, Active/drug effects Cardiac Glycosides/pharmacology Cations, Monovalent Chloromercuribenzoates/pharmacology Digitoxin/metabolism Ethylmaleimide/pharmacology Guinea Pigs In Vitro Techniques Kinetics Myocardial Contraction/drug effects Myocardium/enzymology,metabolism Potassium/metabolism Protein Binding Sodium/metabolism

Cardiac Glycosides Cations, Monovalent Chloromercuribenzoates 4-Chloromercuribenzenesulfonate Sodium Digitoxin Adenosine Triphosphatases Ethylmaleimide Potassium