The effect of tetrodotoxin on the membrane current in cardiac muscle (Purkinje fibers).
D000200:Action Potentials / Q000187:drug effects*; D000818:Animals; D006329:Heart Conduction System / Q000187:drug effects*; D012756:Sheep; D012964:Sodium / Q000494:pharmacology; D013779:Tetrodotoxin / Q000494:pharmacology*
D013779:Tetrodotoxin; D012964:Sodium