title: Proceedings: Significance of cycle length alternation during drug treatment of supraventricular tachycardia.
mesh_terms: D006329:Heart Conduction System / Q000187:drug effects*; D006801:Humans; D013610:Tachycardia / Q000188:drug therapy*; D014700:Verapamil / Q000627:therapeutic use*
chemical_list: D014700:Verapamil