title: Effect of changes in potassium and calcium concentrations on diastolic threshold and strength-interval relationships of the human heart.
mesh_terms: D000368:Aged; D000818:Animals; D002118:Calcium / Q000097:blood* / Q000494:pharmacology; D004492:Edetic Acid / Q000494:pharmacology; D005260:Female; D006321:Heart / Q000502:physiology*; D006327:Heart Block / Q000628:therapy*; D049691:History, Medieval; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial; D011188:Potassium / Q000097:blood*; D011189:Potassium Chloride / Q000494:pharmacology
chemical_list: D011189:Potassium Chloride; D004492:Edetic Acid; D011188:Potassium; D002118:Calcium