title: Effect of verapamil on normal sinoatrial node function and on sick sinus syndrome.
mesh_terms: D000328:Adult; D000368:Aged; D001146:Arrhythmia, Sinus / Q000503:physiopathology*; D001285:Atropine / Q000494:pharmacology; D002304:Cardiac Pacing, Artificial; D004305:Dose-Response Relationship, Drug; D005260:Female; D006801:Humans; D007545:Isoproterenol / Q000494:pharmacology; D008297:Male; D008875:Middle Aged; D011433:Propranolol / Q000494:pharmacology; D012849:Sinoatrial Node / Q000187:drug effects* / Q000502:physiology / Q000503:physiopathology; D014700:Verapamil / Q000494:pharmacology*
chemical_list: D001285:Atropine; D011433:Propranolol; D014700:Verapamil; D007545:Isoproterenol