Modification by Ca ++  removal, Mg ++  and Sr ++  of the membrane effect and the inotropic effect of norepinephrine in rabbit left atria.
D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D016275:Atrial Function; D002110:Caffeine / Q000494:pharmacology; D002118:Calcium / Q000494:pharmacology*; D002462:Cell Membrane / Q000187:drug effects / Q000502:physiology; D003864:Depression, Chemical; D004558:Electric Stimulation; D004594:Electrophysiology; D005260:Female; D008274:Magnesium / Q000494:pharmacology*; D008297:Male; D008564:Membrane Potentials / Q000187:drug effects; D009119:Muscle Contraction / Q000187:drug effects; D009638:Norepinephrine / Q000494:pharmacology*; D009994:Osmolar Concentration; D011817:Rabbits; D013324:Strontium / Q000494:pharmacology*
D002110:Caffeine; D008274:Magnesium; D002118:Calcium; D009638:Norepinephrine; D013324:Strontium