[Influence of some xanthine derivatives of the excitability of the isolated frog heart].
D000818:Animals; D001001:Anura; D004232:Diuretics; D006321:Heart / Q000494:pharmacology*; D006801:Humans; D011898:Ranidae; D019820:Xanthine; D014970:Xanthines / Q000494:pharmacology*
D004232:Diuretics; D014970:Xanthines; D019820:Xanthine
HEART/pharmacology; XANTHINES/pharmacology