title: Concealed bypasses of AV node, revealed by electrical stimulation techniques and intravenous verapamil.
mesh_terms: D004558:Electric Stimulation; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D013614:Tachycardia, Paroxysmal / Q000175:diagnosis* / Q000503:physiopathology; D014700:Verapamil
chemical_list: D014700:Verapamil