title: Paroxysmal supraventricular tachycardia utilizing concealed bypass tract induced by ventricular pacemaker.
mesh_terms: D000368:Aged; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology; D006801:Humans; D008297:Male; D010138:Pacemaker, Artificial / Q000009:adverse effects*; D011433:Propranolol / Q000627:therapeutic use; D013614:Tachycardia, Paroxysmal / Q000209:etiology* / Q000517:prevention & control
chemical_list: D011433:Propranolol