Acetylcholine on quinidine treated atria.
D000109:Acetylcholine / Q000494:pharmacology*; D004837:Epinephrine / Q000494:pharmacology*; D006325:Heart Atria; D011802:Quinidine / Q000494:pharmacology*
D011802:Quinidine; D000109:Acetylcholine; D004837:Epinephrine
ACETYLCHOLINE/pharmacology; EPINEPHRINE/pharmacology; QUINIDINE/pharmacology