The effects of calcium on isometric tension in isolated heart muscle during coupled pacing.
D000818:Animals; D002118:Calcium / Q000494:pharmacology*; D002122:Calcium Chloride / Q000494:pharmacology; D004558:Electric Stimulation; D006168:Guinea Pigs; D006321:Heart / Q000187:drug effects* / Q000502:physiology; D066298:In Vitro Techniques; D008297:Male; D009213:Myography
D002122:Calcium Chloride; D002118:Calcium