title: Demand pacemaker for refractory paroxysmal supraventricular tachycardia.
mesh_terms: D000328:Adult; D004562:Electrocardiography; D005260:Female; D006801:Humans; D010138:Pacemaker, Artificial; D011342:Procainamide / Q000627:therapeutic use; D013614:Tachycardia, Paroxysmal / Q000188:drug therapy / Q000503:physiopathology / Q000628:therapy*
chemical_list: D011342:Procainamide