title: [Calcium blocker and myocardial electrophysiology, with special reference to its effects on specific myocardium].
mesh_terms: D000200:Action Potentials / Q000187:drug effects*; D000328:Adult; D000818:Animals; D002118:Calcium / Q000037:antagonists & inhibitors*; D006801:Humans; D008297:Male; D009200:Myocardial Contraction / Q000187:drug effects*; D011817:Rabbits; D014700:Verapamil / Q000494:pharmacology*
chemical_list: D014700:Verapamil; D002118:Calcium