title: Two pharmacological types of cardiac slow Na+ channels as distinguished by verapamil.
mesh_terms: D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D002395:Catecholamines / Q000494:pharmacology; D002478:Cells, Cultured; D002642:Chick Embryo; D008839:Microelectrodes; D009206:Myocardium / Q000378:metabolism*; D009924:Organ Culture Techniques; D012964:Sodium / Q000378:metabolism*; D013779:Tetrodotoxin / Q000494:pharmacology; D014700:Verapamil / Q000494:pharmacology; D014970:Xanthines / Q000494:pharmacology
chemical_list: D002395:Catecholamines; D014970:Xanthines; D013779:Tetrodotoxin; D012964:Sodium; D014700:Verapamil